# Press Equals

> 556 free calculators that show their work: money, health, home projects, math, dates and unit conversions. Every result has a shareable link that reopens the calculator with the same numbers.

AI assistants can run the calculators directly through the MCP server at https://pressequals.com/mcp (no key needed). Its tools search the calculators, describe their inputs and return exact results with the working and a link back.

Any AI that can open links can get a worked answer as plain text, no setup needed: https://pressequals.com/api/calc/{slug}?input=value (for example https://pressequals.com/api/calc/mortgage?principal=320000&annualRate=6.5). Find a calculator with https://pressequals.com/api/calc?q=keywords. Each answer lists the inputs it accepts.

Links open with inputs filled in: add them as query parameters, e.g. https://pressequals.com/calc/loan?principal=20000&annualRate=7.

## Using Press Equals with AI

- [Use with your AI assistant](https://pressequals.com/ai): how to add the connector to Claude, ChatGPT and other assistants

## Financial & money

- [Loan Calculator](https://pressequals.com/calc/loan): Compute monthly payment, total interest, and payoff for a fixed-rate loan. Enter principal, rate, term, and payment frequency (monthly, bi-weekly, weekly) for personal, auto, or other loans.
- [Mortgage Calculator](https://pressequals.com/calc/mortgage): Estimate monthly housing payment: principal, interest, property tax, and insurance. Add optional extra payment to see payoff time and interest saved.
- [Compound Interest Calculator](https://pressequals.com/calc/compound-interest): Future value and interest earned when a sum grows at a given rate. Choose compounding frequency: annual, monthly, daily, or continuous.
- [Retirement Savings Calculator](https://pressequals.com/calc/retirement-savings): Project how much you need to save for retirement. Enter current balance, contributions, rate of return, and years to see future value.
- [Debt Payoff Calculator](https://pressequals.com/calc/debt-payoff): Timeline and total interest to pay off debt. Compare avalanche vs snowball and see how extra payments shorten payoff.
- [Savings Goal Calculator](https://pressequals.com/calc/savings-goal): How much to save each month to reach a target. Enter goal amount, timeline, and interest rate for a monthly savings plan.
- [Salary vs Hourly Converter](https://pressequals.com/calc/salary-hourly): Convert annual salary to hourly wage or hourly to salary. Enter hours per week to compare job offers or contract rates.
- [Sales Tax Calculator](https://pressequals.com/calc/sales-tax): Add or remove sales tax from a price. Enter amount and tax rate to get total with tax or pre-tax price.
- [Credit Card Interest Calculator](https://pressequals.com/calc/credit-card-interest): Estimate interest and payoff time for credit card debt. Enter balance, APR, and monthly payment to see total interest and months to pay off.
- [ROI Calculator](https://pressequals.com/calc/roi): Return on investment: profit and ROI percent. Choose simple (total) or annualized ROI over a given number of years for comparison.
- [Break-Even Calculator](https://pressequals.com/calc/break-even): Break-even point for fixed and variable costs.
- [Profit Margin Calculator](https://pressequals.com/calc/profit-margin): Gross and net profit margin percentage.
- [Net Pay Calculator](https://pressequals.com/calc/net-pay): Take-home pay after tax and deductions (simplified).
- [Payment Calculator](https://pressequals.com/calc/payment-calculator): Monthly payment for any loan.
- [Amortization Calculator](https://pressequals.com/calc/amortization-calculator): Full loan amortization schedule by year: principal, interest and balance. Add an extra monthly payment to see how much sooner you finish and how much interest you save.
- [Investment Calculator](https://pressequals.com/calc/investment-calculator): How a starting amount plus monthly contributions grows over time. Shows total contributed, earnings, a year-by-year table and the value in today's dollars.
- [Currency Calculator](https://pressequals.com/calc/currency-calculator): Convert between currencies (manual rate).
- [Inflation Calculator](https://pressequals.com/calc/inflation-calculator): Purchasing power over time with inflation.
- [Mortgage Payoff Calculator](https://pressequals.com/calc/mortgage-payoff-calculator): Pay off mortgage faster with extra payments.
- [Income Tax Calculator](https://pressequals.com/calc/income-tax-calculator): Estimate federal income tax (simplified).
- [401(k) Calculator](https://pressequals.com/calc/401k-calculator): Project your 401(k) at retirement with your contribution, employer match, raises and 2026 IRS limits including catch-up contributions. Shows the balance in today's dollars.
- [Interest Rate Calculator](https://pressequals.com/calc/interest-rate-calculator): Solve for interest rate from payment and term.
- [House Affordability Calculator](https://pressequals.com/calc/house-affordability-calculator): How much house you can afford.
- [Rent Calculator](https://pressequals.com/calc/rent-calculator): Rent affordability (e.g. 30% of income).
- [Marriage Tax Calculator](https://pressequals.com/calc/marriage-tax-calculator): Married vs single tax comparison (simplified).
- [Estate Tax Calculator](https://pressequals.com/calc/estate-tax-calculator): Federal estate tax estimate (simplified).
- [Pension Calculator](https://pressequals.com/calc/pension-calculator): Pension benefit estimate.
- [Social Security Calculator](https://pressequals.com/calc/social-security-calculator): Social Security benefit estimate (simplified).
- [Annuity Calculator](https://pressequals.com/calc/annuity-calculator): Annuity present value and payments.
- [Annuity Payout Calculator](https://pressequals.com/calc/annuity-payout-calculator): Annuity payout amount over time.
- [Debt Consolidation Calculator](https://pressequals.com/calc/debt-consolidation-calculator): Compare consolidating debts into one loan.
- [Repayment Calculator](https://pressequals.com/calc/repayment-calculator): Loan repayment schedule.
- [Student Loan Calculator](https://pressequals.com/calc/student-loan-calculator): Student loan payment and payoff.
- [College Cost Calculator](https://pressequals.com/calc/college-cost-calculator): Savings needed for college.
- [Simple Interest Calculator](https://pressequals.com/calc/simple-interest-calculator): Simple interest (I = P × r × t).
- [CD Calculator](https://pressequals.com/calc/cd-calculator): Certificate of deposit growth.
- [Bond Calculator](https://pressequals.com/calc/bond-calculator): Bond price and yield (simplified).
- [Mutual Fund Calculator](https://pressequals.com/calc/mutual-fund-calculator): Mutual fund growth after the expense ratio and any sales load, with the dollar cost of fees compared with the same fund at no cost.
- [Roth IRA Calculator](https://pressequals.com/calc/roth-ira-calculator): Roth IRA balance at retirement using 2026 contribution limits and income phase-outs, plus the tax you avoid because qualified withdrawals are tax-free.
- [Traditional IRA Calculator](https://pressequals.com/calc/ira-calculator): Traditional IRA growth, this year's tax deduction (with the 2026 workplace-plan phase-out) and what the balance is worth after tax in retirement.
- [RMD Calculator](https://pressequals.com/calc/rmd-calculator): Required minimum distribution from IRA/401(k).
- [VAT Calculator](https://pressequals.com/calc/vat-calculator): Add or remove VAT from price.
- [Cash Back or Low Interest Calculator](https://pressequals.com/calc/cash-back-calculator): Compare cash back vs low APR.
- [Auto Lease Calculator](https://pressequals.com/calc/auto-lease-calculator): Monthly lease payment estimate.
- [Depreciation Calculator](https://pressequals.com/calc/depreciation-calculator): Asset depreciation (straight-line).
- [Average Return Calculator](https://pressequals.com/calc/average-return-calculator): Average investment return over periods.
- [Discount Calculator](https://pressequals.com/calc/discount-calculator): Percent off and sale price.
- [Business Loan Calculator](https://pressequals.com/calc/business-loan-calculator): Business loan payment and term.
- [Debt-to-Income Ratio Calculator](https://pressequals.com/calc/debt-to-income-calculator): DTI ratio for loan qualification.
- [Real Estate Calculator](https://pressequals.com/calc/real-estate-calculator): Cap rate and basic real estate metrics.
- [Boat Loan Calculator](https://pressequals.com/calc/boat-loan-calculator): Boat loan monthly payment.
- [Lease Calculator](https://pressequals.com/calc/lease-calculator): Generic lease payment (e.g. equipment).
- [Refinance Calculator](https://pressequals.com/calc/refinance-calculator): Should you refinance? Break-even and savings.
- [Budget Calculator](https://pressequals.com/calc/budget-calculator): 50/30/20 or custom budget split.
- [Rental Property Calculator](https://pressequals.com/calc/rental-property-calculator): Rental income and expenses.
- [IRR Calculator](https://pressequals.com/calc/irr-calculator): Internal rate of return.
- [APR Calculator](https://pressequals.com/calc/apr-calculator): Annual percentage rate from fees and rate.
- [FHA Loan Calculator](https://pressequals.com/calc/fha-loan-calculator): FHA mortgage payment with the 1.75% upfront and current annual mortgage insurance premium (MIP), property tax and insurance. Shows how long MIP lasts.
- [VA Mortgage Calculator](https://pressequals.com/calc/va-mortgage-calculator): VA home loan payment with the 2026 VA funding fee by down payment and first or repeat use, no PMI, plus property tax and insurance.
- [Home Equity Loan Calculator](https://pressequals.com/calc/home-equity-loan-calculator): How much you can borrow against your home at a lender's combined LTV limit, and the monthly payment and interest on a fixed-rate home equity loan.
- [HELOC Calculator](https://pressequals.com/calc/heloc-calculator): HELOC draw and payment estimate.
- [Down Payment Calculator](https://pressequals.com/calc/down-payment-calculator): Down payment amount and percent.
- [Rent vs. Buy Calculator](https://pressequals.com/calc/rent-vs-buy-calculator): Compare renting vs buying a home.
- [Payback Period Calculator](https://pressequals.com/calc/payback-period-calculator): Investment payback period.
- [Present Value Calculator](https://pressequals.com/calc/present-value-calculator): PV of future cash flows.
- [Future Value Calculator](https://pressequals.com/calc/future-value-calculator): FV of lump sum or annuity.
- [Commission Calculator](https://pressequals.com/calc/commission-calculator): Sales commission amount.
- [Mortgage Calculator UK](https://pressequals.com/calc/mortgage-uk-calculator): UK mortgage monthly repayments in pounds for repayment or interest-only mortgages, with loan-to-value and stamp duty for England and Northern Ireland.
- [Canadian Mortgage Calculator](https://pressequals.com/calc/canadian-mortgage-calculator): Canadian mortgage payments with semi-annual compounding, CMHC insurance, minimum down payment rules and accelerated bi-weekly or weekly payments.
- [Mortgage Amortization Calculator](https://pressequals.com/calc/mortgage-amortization-calculator): Year-by-year mortgage amortization schedule showing principal, interest and remaining balance, and how extra payments shorten the loan.
- [Percent Off Calculator](https://pressequals.com/calc/percent-off-calculator): Discount percentage and final price.
- [Tip Calculator](https://pressequals.com/calc/tip-calculator): Tip amount and split bill.
- [1099 Penalty Estimator](https://pressequals.com/calc/form-1099-penalty): Estimate IRS penalties for late 1099 filing.
- [Cost of Smoking Calculator](https://pressequals.com/calc/cost-of-smoking): Annual and long-term cost of smoking.
- [Subscription Totalizer](https://pressequals.com/calc/subscription-totalizer): Total monthly and yearly cost of subscriptions.
- [SaaS Runway Calculator](https://pressequals.com/calc/runway-calculator): Months of runway from cash and monthly burn.
- [Rule of 72 Calculator](https://pressequals.com/calc/rule-of-72): Years to double your money at a given interest rate.
- [CAGR Calculator](https://pressequals.com/calc/cagr): Compound annual growth rate from start and end value.
- [Net Worth Calculator](https://pressequals.com/calc/net-worth-calculator): Calculate net worth: assets minus liabilities.
- [EMI Calculator](https://pressequals.com/calc/emi-calculator): Equated monthly installment for a loan (principal, rate, term).
- [GST Calculator](https://pressequals.com/calc/gst-calculator): GST/VAT inclusive or exclusive calculation from amount and rate.
- [Unit Price Calculator](https://pressequals.com/calc/unit-price-calculator): Compare unit prices of two products (price per quantity).
- [Markup Calculator](https://pressequals.com/calc/markup-calculator): Calculate selling price from cost and markup percentage.
- [APY Calculator](https://pressequals.com/calc/apy-calculator): Turn an interest rate (APR) into the annual percentage yield (APY) you actually earn, and see a year of interest on your deposit for daily, monthly or quarterly compounding.
- [Savings Calculator](https://pressequals.com/calc/savings-calculator): See how a starting balance and regular monthly deposits grow with interest over time, with a year-by-year chart of your balance and how much came from interest.
- [Mortgage Points Calculator](https://pressequals.com/calc/mortgage-points-calculator): Find out whether buying discount points to lower your mortgage rate pays off: the cost, the monthly saving and how many months until you break even.
- [PMI Calculator](https://pressequals.com/calc/pmi-calculator): Estimate private mortgage insurance on a conventional loan with less than 20% down: the monthly cost, the total you’ll pay and when PMI drops off.
- [Closing Cost Calculator](https://pressequals.com/calc/closing-cost-calculator): Estimate the closing costs on a home purchase and the total cash you’ll need at closing, including your down payment.
- [Property Tax Calculator](https://pressequals.com/calc/property-tax-calculator): Work out your yearly and monthly property tax from your home’s value, your local tax rate and any homestead exemption.
- [Cap Rate Calculator](https://pressequals.com/calc/cap-rate-calculator): Calculate the capitalization rate of a rental property from its price, rent, vacancy and operating expenses, along with its net operating income.
- [Cash on Cash Return Calculator](https://pressequals.com/calc/cash-on-cash-return-calculator): Measure a rental property’s yearly cash flow against the cash you put in, after the mortgage, so you can compare it with other investments.
- [Gross Rent Multiplier Calculator](https://pressequals.com/calc/gross-rent-multiplier-calculator): Calculate a rental property’s gross rent multiplier (GRM), the price divided by a year’s rent, to compare properties quickly.
- [DSCR Calculator](https://pressequals.com/calc/dscr-calculator): Work out the debt service coverage ratio lenders use for rental and business loans: how many times your net operating income covers the loan payments.
- [Loan-to-Value (LTV) Calculator](https://pressequals.com/calc/ltv-calculator): Find your loan-to-value ratio and home equity, and how much you’d need to pay down to reach 80% LTV and drop PMI.
- [Biweekly Mortgage Calculator](https://pressequals.com/calc/biweekly-mortgage-calculator): See how paying half your mortgage every two weeks, 26 half-payments a year, pays the loan off years sooner and cuts the interest you pay.
- [Balloon Loan Calculator](https://pressequals.com/calc/balloon-loan-calculator): Calculate the monthly payment on a balloon loan and the lump sum due when the balloon term ends.
- [Interest-Only Loan Calculator](https://pressequals.com/calc/interest-only-loan-calculator): Compare the low payment during an interest-only period with the higher payment once principal kicks in, and the extra interest it costs.
- [Mortgage Recast Calculator](https://pressequals.com/calc/mortgage-recast-calculator): See how much a lump-sum payment and a mortgage recast lower your monthly payment, and the interest you save, while keeping your rate and term.
- [Overtime Calculator](https://pressequals.com/calc/overtime-calculator): Work out overtime pay at time and a half (or double time) and your total pay for the week.
- [Pay Raise Calculator](https://pressequals.com/calc/pay-raise-calculator): See your new salary after a raise, by percentage or dollar amount, and how much more you’ll earn per year, month, paycheck and hour.
- [Bonus Tax Calculator](https://pressequals.com/calc/bonus-tax-calculator): Estimate the tax withheld from a bonus using the IRS flat 22% supplemental rate, plus Social Security, Medicare and state tax, and what lands in your account.
- [Self-Employment Tax Calculator](https://pressequals.com/calc/self-employment-tax-calculator): Estimate 2026 self-employment tax (Social Security and Medicare) on your net business income, the half you can deduct, and a quarterly payment.
- [Capital Gains Tax Calculator](https://pressequals.com/calc/capital-gains-tax-calculator): Estimate the federal tax on selling stock, crypto or property at 2026 rates: 0%, 15% or 20% for long-term gains, ordinary rates for short-term, plus the 3.8% NIIT.
- [Emergency Fund Calculator](https://pressequals.com/calc/emergency-fund-calculator): Find how big your emergency fund should be, how much more you need, and how long it will take to get there at your saving rate.
- [FIRE Calculator](https://pressequals.com/calc/fire-calculator): Find your financial independence (FIRE) number from your spending and safe withdrawal rate, and how many years until you can retire early.
- [Dividend Calculator](https://pressequals.com/calc/dividend-calculator): Project dividend income and portfolio growth from the dividend yield, with dividends reinvested (DRIP) or taken as cash, year by year.
- [Stock Profit Calculator](https://pressequals.com/calc/stock-profit-calculator): Calculate the profit or loss and percentage return on a stock (or crypto) trade, including commissions on the buy and sell.
- [Stock Average Cost Calculator](https://pressequals.com/calc/average-cost-calculator): Find your average cost per share across several purchases, for dollar-cost averaging or averaging down on a stock or crypto position.
- [P/E Ratio Calculator](https://pressequals.com/calc/pe-ratio-calculator): Calculate a stock’s price-to-earnings ratio and earnings yield from its share price and earnings per share.
- [NPV Calculator](https://pressequals.com/calc/npv-calculator): Calculate the net present value of an investment from its upfront cost, yearly cash flows and discount rate, to see whether it’s worth doing.
- [WACC Calculator](https://pressequals.com/calc/wacc-calculator): Calculate a company’s weighted average cost of capital from the value and cost of its equity and debt, with the tax shield on interest.
- [Freelance Hourly Rate Calculator](https://pressequals.com/calc/freelance-rate-calculator): Work out what to charge per hour as a freelancer or contractor to reach your take-home income after taxes, expenses and time off.
- [Credit Utilization Calculator](https://pressequals.com/calc/credit-utilization-calculator): Calculate your credit card utilization ratio, which affects your credit score, and how much to pay down to get under 30% or 10%.
- [Loan Comparison Calculator](https://pressequals.com/calc/loan-comparison-calculator): Compare two loan offers side by side, with different rates, terms and fees, to see which one costs less in total and per month.
- [House Flipping Calculator](https://pressequals.com/calc/house-flipping-calculator): Estimate the profit and return on a fix-and-flip from the purchase price, repairs, holding and selling costs, plus the 70% rule maximum offer.
- [Rent Increase Calculator](https://pressequals.com/calc/rent-increase-calculator): Calculate a new rent from a percentage increase, or find the percentage between the old and new rent, with the extra cost per month and year.
- [Rent Split Calculator](https://pressequals.com/calc/rent-split-calculator): Split rent fairly between roommates by bedroom size, with shared space divided equally, so bigger rooms pay more.
- [Retirement Withdrawal Calculator](https://pressequals.com/calc/retirement-withdrawal-calculator): See how long your retirement savings will last with yearly withdrawals that rise with inflation, and the safe amount to take each year.
- [HSA Calculator](https://pressequals.com/calc/hsa-calculator): Find your 2026 HSA contribution limit, how much tax you save by contributing, and what your health savings account could grow to.
- [Savings Rate Calculator](https://pressequals.com/calc/savings-rate-calculator): Work out what percentage of your income you save, counting retirement contributions and employer match, and what it means for retiring early.
- [Credit Card Minimum Payment Calculator](https://pressequals.com/calc/credit-card-minimum-payment-calculator): See how long it takes to pay off a credit card making only the minimum payment, the interest it costs, and how much faster a fixed payment is.
- [Home Sale Proceeds Calculator](https://pressequals.com/calc/home-sale-proceeds-calculator): Estimate how much cash you will walk away with when you sell your house, after the mortgage, agent commissions, closing costs and repairs.
- [Personal Loan Calculator](https://pressequals.com/calc/personal-loan-calculator): Work out the monthly payment, total interest and true cost of a personal loan, including any origination fee taken out of the money you receive.
- [SIP Calculator](https://pressequals.com/calc/sip-calculator): See what a monthly SIP (systematic investment plan) in a mutual fund could grow to, with an optional yearly step-up in the amount.
- [Fixed Deposit (FD) Calculator](https://pressequals.com/calc/fd-calculator): Find the maturity amount and interest earned on a fixed deposit or term deposit, with monthly, quarterly, half-yearly or yearly compounding.
- [Crypto Profit Calculator](https://pressequals.com/calc/crypto-profit-calculator): Work out the profit or loss on a crypto trade from what you invested, the buy and sell prices, and the exchange fees.
- [Real Rate of Return Calculator](https://pressequals.com/calc/inflation-adjusted-return-calculator): Find the real return on an investment after inflation, and what your money will be worth in today’s dollars.
- [Wedding Budget Calculator](https://pressequals.com/calc/wedding-budget-calculator): Split a total wedding budget into typical amounts for the venue and food, photos, attire, flowers, music and more, and see the cost per guest.
- [Tithe Calculator](https://pressequals.com/calc/tithe-calculator): Work out a 10% tithe, or any giving percentage, on your income per year, month, paycheck and week.
- [Price per Square Foot Calculator](https://pressequals.com/calc/price-per-square-foot-calculator): Work out the price per square foot (and per square meter) of a home, apartment or rental, and compare it with another place.
- [Mileage Reimbursement Calculator](https://pressequals.com/calc/mileage-reimbursement-calculator): Work out a mileage reimbursement or tax deduction from the miles driven and a per-mile rate such as the IRS standard rate.

## Math & statistics

- [Quadratic Equation Solver](https://pressequals.com/calc/quadratic): Solve ax² + bx + c = 0.
- [Statistics Calculator](https://pressequals.com/calc/statistics): Mean, median, mode, standard deviation.
- [Fraction & Percentage Calculator](https://pressequals.com/calc/fraction-percent): Convert and calculate fractions and percentages.
- [Geometry Calculator](https://pressequals.com/calc/geometry): Area, volume, perimeter of common shapes.
- [GPA Calculator](https://pressequals.com/calc/gpa): Grade point average from letter grades.
- [Scientific Calculator](https://pressequals.com/calc/scientific-calculator): Sin, cos, tan, log, power, sqrt.
- [Triangle Calculator](https://pressequals.com/calc/triangle-calculator): Triangle sides, angles, area.
- [Volume Calculator](https://pressequals.com/calc/volume-calculator): Volume of a box, cube, cylinder, cone, sphere, hemisphere or pyramid, converted to cubic feet, cubic meters, liters and US gallons.
- [Random Number Generator](https://pressequals.com/calc/random-number-generator): Random integer in a range.
- [Number Sequence Calculator](https://pressequals.com/calc/number-sequence-calculator): Next number in sequence (arithmetic/geometric).
- [Percent Error Calculator](https://pressequals.com/calc/percent-error-calculator): Percent error between actual and expected.
- [Exponent Calculator](https://pressequals.com/calc/exponent-calculator): Power and exponent.
- [Binary Calculator](https://pressequals.com/calc/binary-calculator): Binary to decimal and operations.
- [Hex Calculator](https://pressequals.com/calc/hex-calculator): Hexadecimal to decimal and operations.
- [Slope Calculator](https://pressequals.com/calc/slope-calculator): Slope from two points or equation.
- [Log Calculator](https://pressequals.com/calc/log-calculator): Logarithm (log10, ln).
- [Sample Size Calculator](https://pressequals.com/calc/sample-size-calculator): Sample size for margin of error.
- [Probability Calculator](https://pressequals.com/calc/probability-calculator): Basic probability (single event).
- [Mean, Median, Mode, Range Calculator](https://pressequals.com/calc/mean-median-mode-calculator): Descriptive statistics.
- [Permutation and Combination Calculator](https://pressequals.com/calc/permutation-combination-calculator): nPr and nCr.
- [Z-score Calculator](https://pressequals.com/calc/z-score-calculator): Z-score from mean and SD.
- [Confidence Interval Calculator](https://pressequals.com/calc/confidence-interval-calculator): CI for mean (normal).
- [Ratio Calculator](https://pressequals.com/calc/ratio-calculator): Ratio simplify and compare.
- [Distance Calculator](https://pressequals.com/calc/distance-calculator): Distance between two points.
- [Circle Calculator](https://pressequals.com/calc/circle-calculator): Circle area, circumference, radius.
- [Surface Area Calculator](https://pressequals.com/calc/surface-area-calculator): Surface area of 3D shapes.
- [Pythagorean Theorem Calculator](https://pressequals.com/calc/pythagorean-calculator): Right triangle side from a²+b²=c².
- [Right Triangle Calculator](https://pressequals.com/calc/right-triangle-calculator): Right triangle sides and angles.
- [Root Calculator](https://pressequals.com/calc/root-calculator): Square root, nth root.
- [Least Common Multiple Calculator](https://pressequals.com/calc/lcm-calculator): LCM of two or more numbers.
- [Greatest Common Factor Calculator](https://pressequals.com/calc/gcf-calculator): GCF of two or more numbers.
- [Factor Calculator](https://pressequals.com/calc/factor-calculator): Factors of a number.
- [Rounding Calculator](https://pressequals.com/calc/rounding-calculator): Round to decimal place or significant figures.
- [Matrix Calculator](https://pressequals.com/calc/matrix-calculator): Matrix add, multiply, determinant.
- [Scientific Notation Calculator](https://pressequals.com/calc/scientific-notation-calculator): Convert to/from scientific notation.
- [Prime Factorization Calculator](https://pressequals.com/calc/prime-factorization-calculator): Prime factors of a number.
- [Basic Calculator](https://pressequals.com/calc/basic-calculator): Add, subtract, multiply, divide.
- [Long Division Calculator](https://pressequals.com/calc/long-division-calculator): Long division with steps.
- [Average Calculator](https://pressequals.com/calc/average-calculator): Average (mean) of numbers.
- [P-value Calculator](https://pressequals.com/calc/p-value-calculator): P-value from z-score (one-tailed).
- [Grade Calculator](https://pressequals.com/calc/grade-calculator): Grade from points or weighted categories.
- [Percent Change Calculator](https://pressequals.com/calc/percent-change-calculator): Percent change from old value to new value.
- [Absolute Value Calculator](https://pressequals.com/calc/absolute-value): Absolute value |x| of a number.
- [Absolute Difference Calculator](https://pressequals.com/calc/absolute-difference): Absolute difference |a − b| between two numbers.
- [Modulo Calculator](https://pressequals.com/calc/modulo): Remainder (a mod b) and quotient.
- [Factorial Calculator (n!)](https://pressequals.com/calc/factorial): Factorial of a non-negative integer.
- [Prime Number Calculator](https://pressequals.com/calc/prime-numbers): List first N primes or check if a number is prime.
- [Percentage Difference Calculator](https://pressequals.com/calc/percentage-difference): Symmetric percentage difference between two values.
- [Fibonacci Numbers Calculator](https://pressequals.com/calc/fibonacci): First N numbers in the Fibonacci sequence.
- [Pascal's Triangle Generator](https://pressequals.com/calc/pascal-triangle): First N rows of Pascal's triangle.
- [Vote Percentage Calculator](https://pressequals.com/calc/vote-percentage): Vote share as a percentage of total votes.
- [Unit Rate Calculator](https://pressequals.com/calc/unit-rate): Rate per one unit (e.g. price per item).
- [Odds Calculator](https://pressequals.com/calc/odds-calculator): Odds for/against and probability from wins and losses.
- [Weighted Average Calculator](https://pressequals.com/calc/weighted-average-calculator): Calculate a weighted average (weighted mean) from values and their weights, for grades, prices, portfolios or survey scores.
- [Midpoint Calculator](https://pressequals.com/calc/midpoint-calculator): Find the midpoint between two points on a graph, plus the distance between them and the slope of the line joining them.
- [Arc Length Calculator](https://pressequals.com/calc/arc-length-calculator): Calculate the arc length, sector area and chord length of a circle from its radius and the central angle in degrees or radians.
- [Polar to Cartesian Converter](https://pressequals.com/calc/polar-coordinates-converter): Convert between polar coordinates (r, θ) and Cartesian coordinates (x, y), with the angle in degrees or radians.
- [System of Equations Solver](https://pressequals.com/calc/system-of-equations-calculator): Solve two linear equations in two unknowns (x and y) and see whether the system has one solution, none or infinitely many.
- [Proportion Calculator](https://pressequals.com/calc/proportion-calculator): Solve a proportion a/b = c/x for the missing value, the cross-multiplication used for recipes, maps, scale drawings and unit prices.
- [Golden Ratio Calculator](https://pressequals.com/calc/golden-ratio-calculator): Split a length by the golden ratio (φ ≈ 1.618), or find the matching longer or shorter side, for design, layout and photography.
- [Binomial Probability Calculator](https://pressequals.com/calc/binomial-probability-calculator): Find the probability of exactly, at most or at least k successes in n trials with success probability p, plus the mean and standard deviation.
- [Standard Error Calculator](https://pressequals.com/calc/standard-error-calculator): Calculate the standard error of the mean from a list of numbers, with the sample standard deviation and an approximate 95% confidence interval.
- [Coefficient of Variation Calculator](https://pressequals.com/calc/coefficient-of-variation-calculator): Calculate the coefficient of variation (relative standard deviation) of a data set, to compare how spread out data sets with different averages are.
- [Correlation Coefficient Calculator](https://pressequals.com/calc/correlation-coefficient-calculator): Calculate the Pearson correlation coefficient (r) and r² between two sets of numbers, and how strong the relationship is.
- [Linear Regression Calculator](https://pressequals.com/calc/linear-regression-calculator): Fit a least-squares line of best fit (y = mx + b) to paired data and get the slope, intercept, r² and a prediction for any x.
- [Quartile and IQR Calculator](https://pressequals.com/calc/quartile-calculator): Find the quartiles, interquartile range (IQR) and five-number summary of a data set, plus the fences for spotting outliers.
- [Percentile Calculator](https://pressequals.com/calc/percentile-calculator): Find the value at any percentile of a data set, and the percentile rank of a particular value.
- [Number Base Converter](https://pressequals.com/calc/number-base-converter): Convert whole numbers between any bases from 2 to 36: binary, octal, decimal, hexadecimal and more, including very large numbers.
- [Significant Figures Calculator](https://pressequals.com/calc/significant-figures-calculator): Count the significant figures in a number and round it to any number of significant figures, with the result in scientific notation too.
- [Decimal to Fraction Calculator](https://pressequals.com/calc/decimal-to-fraction-calculator): Convert a decimal to a fraction in lowest terms and as a mixed number, like 0.75 = 3/4 or 2.375 = 2 3/8.
- [Final Grade Calculator](https://pressequals.com/calc/final-grade-calculator): Work out the score you need on your final exam to finish the class with the grade you want.
- [Test Grade Calculator](https://pressequals.com/calc/test-grade-calculator): Turn the number of questions and the number wrong into a test score percentage and letter grade, for teachers and students.
- [Lottery Odds Calculator](https://pressequals.com/calc/lottery-odds-calculator): Calculate the odds of winning a lottery jackpot from how many numbers are drawn, plus any bonus ball, with Powerball and Mega Millions presets.
- [Percentage Calculator](https://pressequals.com/calc/percentage-calculator): Answer the three everyday percentage questions: what is X% of Y, X is what percent of Y, and X is Y% of what number.
- [Fraction Calculator](https://pressequals.com/calc/fraction-calculator): Add, subtract, multiply and divide fractions and mixed numbers, with the answer simplified, as a mixed number and as a decimal.
- [Regular Polygon Calculator](https://pressequals.com/calc/polygon-calculator): Calculate the area, perimeter, angles, apothem and circumradius of a regular polygon from the number of sides and the side length.
- [Ellipse Calculator](https://pressequals.com/calc/ellipse-calculator): Calculate the area, perimeter (circumference), eccentricity and focal distance of an ellipse from its two semi-axes.
- [Trapezoid Calculator](https://pressequals.com/calc/trapezoid-calculator): Find the area, midline and perimeter of a trapezoid from its two parallel sides and height, with leg lengths for an isosceles trapezoid.
- [Expected Value Calculator](https://pressequals.com/calc/expected-value-calculator): Calculate the expected value, variance and standard deviation of outcomes with their probabilities, for bets, games and decisions.
- [Normal Distribution Calculator](https://pressequals.com/calc/normal-distribution-calculator): Find probabilities under a normal (bell) curve: below a value, above it, or between two values, from the mean and standard deviation.
- [Margin of Error Calculator](https://pressequals.com/calc/margin-of-error-calculator): Calculate the margin of error for a survey or poll from the sample size, confidence level and result, with an optional population size.
- [Vector Calculator](https://pressequals.com/calc/vector-calculator): Add and subtract 3D vectors and find the dot product, cross product, magnitudes and the angle between them.
- [Standard Deviation Calculator](https://pressequals.com/calc/standard-deviation-calculator): Calculate the sample and population standard deviation and variance of a data set, with the mean and the steps shown.
- [Trigonometry Calculator](https://pressequals.com/calc/trig-calculator): Find sine, cosine, tangent and their reciprocals for any angle in degrees or radians, or the inverse functions for a value.
- [Exponential Growth Calculator](https://pressequals.com/calc/exponential-growth-calculator): Model exponential growth or decay from a starting amount, rate and time, and find the doubling or half-life time.
- [Complex Number Calculator](https://pressequals.com/calc/complex-number-calculator): Add, subtract, multiply and divide complex numbers, and see the result in rectangular and polar form.
- [ACT Score Calculator](https://pressequals.com/calc/act-score-calculator): Work out your ACT composite score from your section scores, for the new enhanced ACT (English, math, reading) or the classic four-section test, plus the STEM score.
- [Grade Curve Calculator](https://pressequals.com/calc/grade-curve-calculator): Curve a test score by raising the top score to 100, by the square-root method or by scaling to the highest score.
- [Attendance Percentage Calculator](https://pressequals.com/calc/attendance-calculator): Find your attendance percentage, and how many classes you can still miss or must attend in a row to reach a target like 75%.

## Science & engineering

- [Half-Life Calculator](https://pressequals.com/calc/half-life-calculator): Half-life decay (exponential).
- [Voltage Drop Calculator](https://pressequals.com/calc/voltage-drop-calculator): Voltage drop in wire (DC).
- [Resistor Calculator](https://pressequals.com/calc/resistor-calculator): Resistor color codes and series/parallel.
- [Ohms Law Calculator](https://pressequals.com/calc/ohms-law-calculator): V = I × R.
- [Density Calculator](https://pressequals.com/calc/density-calculator): Density from mass and volume.
- [Molarity Calculator](https://pressequals.com/calc/molarity-calculator): Molarity (M = mol/L).
- [Molecular Weight Calculator](https://pressequals.com/calc/molecular-weight-calculator): Molecular weight from formula.
- [E = mc² Calculator](https://pressequals.com/calc/emc2): Convert mass to energy using E = mc².
- [Speed, Distance and Time Calculator](https://pressequals.com/calc/speed-distance-time-calculator): Solve for speed, distance or travel time when you know the other two, in miles or kilometers, with the pace too.
- [Acceleration Calculator](https://pressequals.com/calc/acceleration-calculator): Calculate acceleration from a change in speed over time, and the distance covered while speeding up, in metric or imperial units.
- [Force Calculator (F = ma)](https://pressequals.com/calc/force-calculator): Calculate force from mass and acceleration with Newton’s second law, F = ma, in newtons and pounds-force.
- [Kinetic Energy Calculator](https://pressequals.com/calc/kinetic-energy-calculator): Calculate kinetic energy from mass and speed (KE = ½mv²) in joules, kilojoules and foot-pounds.
- [Potential Energy Calculator](https://pressequals.com/calc/potential-energy-calculator): Calculate gravitational potential energy from mass and height (PE = mgh), on Earth or with your own value of g.
- [Momentum Calculator](https://pressequals.com/calc/momentum-calculator): Calculate momentum (p = mv) from mass and velocity, or the velocity of a mass with a given momentum.
- [Projectile Motion Calculator](https://pressequals.com/calc/projectile-motion-calculator): Calculate how far, how high and how long a projectile flies from its launch speed, angle and height, ignoring air resistance.
- [Free Fall Calculator](https://pressequals.com/calc/free-fall-calculator): Calculate how long it takes an object to fall from a height and how fast it’s going when it lands, ignoring air resistance.
- [pH Calculator](https://pressequals.com/calc/ph-calculator): Calculate pH and pOH from the hydrogen ion concentration, or find the [H⁺] and [OH⁻] concentrations from a pH, at 25 °C.
- [Dilution Calculator (C1V1 = C2V2)](https://pressequals.com/calc/dilution-calculator): Solve the dilution equation C1V1 = C2V2 for any one value: how much stock solution to use, or the final concentration or volume.
- [Ideal Gas Law Calculator (PV = nRT)](https://pressequals.com/calc/ideal-gas-law-calculator): Solve the ideal gas law PV = nRT for pressure, volume, moles or temperature, in kPa, liters, moles and kelvin.
- [LED Resistor Calculator](https://pressequals.com/calc/led-resistor-calculator): Find the current-limiting resistor for an LED from the supply voltage, LED forward voltage and current, with the nearest standard value and power rating.
- [Watts to Amps Calculator](https://pressequals.com/calc/watts-to-amps-calculator): Convert watts to amps for DC, single-phase AC and three-phase AC circuits, with the power factor, to size breakers and wires.
- [Amps to Watts Calculator](https://pressequals.com/calc/amps-to-watts-calculator): Convert amps to watts for DC, single-phase AC and three-phase AC circuits, including the power factor.
- [Battery Life Calculator](https://pressequals.com/calc/battery-life-calculator): Estimate how long a battery will last from its capacity in mAh or Wh and the device’s current draw, allowing for real-world losses.
- [Relative Humidity Calculator](https://pressequals.com/calc/relative-humidity-calculator): Calculate relative humidity from the air temperature and dew point, or from dry-bulb and wet-bulb thermometer readings.
- [Boiling Point at Altitude Calculator](https://pressequals.com/calc/boiling-point-altitude-calculator): Find the temperature water boils at your elevation, and the air pressure there, for cooking, canning and brewing.
- [Wavelength to Frequency Calculator](https://pressequals.com/calc/wavelength-frequency-calculator): Convert between wavelength and frequency for light, radio and sound waves, and find a photon’s energy.
- [Specific Heat Calculator](https://pressequals.com/calc/specific-heat-calculator): Use Q = mcΔT to find the heat needed to warm or cool a material, or the temperature change from a given amount of heat.
- [Resistors in Series and Parallel Calculator](https://pressequals.com/calc/series-parallel-calculator): Combine any number of resistors, capacitors or inductors in series or in parallel and get the total value.
- [Gravitational Force Calculator](https://pressequals.com/calc/gravitational-force-calculator): Calculate the gravitational pull between two masses with Newton’s law of universal gravitation.
- [Percent Yield Calculator](https://pressequals.com/calc/percent-yield-calculator): Calculate the percent yield of a chemical reaction from the actual and theoretical yield.
- [Grams to Moles Calculator](https://pressequals.com/calc/grams-to-moles-calculator): Convert grams to moles, or moles to grams, from a chemical formula, with the molar mass and number of molecules.
- [Buffer pH Calculator](https://pressequals.com/calc/henderson-hasselbalch-calculator): Calculate the pH of a buffer with the Henderson–Hasselbalch equation from the pKa and the base and acid concentrations, or the ratio needed for a target pH.
- [RC Time Constant Calculator](https://pressequals.com/calc/rc-time-constant-calculator): Calculate the RC time constant, charge time and cutoff frequency of a resistor-capacitor circuit.
- [Work and Power Calculator](https://pressequals.com/calc/work-power-calculator): Calculate the work done by a force over a distance, and the power when it happens over a given time.
- [Torque Calculator](https://pressequals.com/calc/torque-calculator): Calculate torque from force and lever arm length, at any angle, in newton-meters and pound-feet.
- [Centripetal Force Calculator](https://pressequals.com/calc/centripetal-force-calculator): Calculate centripetal force and acceleration for an object moving in a circle from its mass, speed and radius.
- [Escape Velocity Calculator](https://pressequals.com/calc/escape-velocity-calculator): Calculate the escape velocity from Earth, the Moon, Mars or any planet or star, from its mass and radius.
- [Time Dilation Calculator](https://pressequals.com/calc/time-dilation-calculator): See how much time slows for a fast-moving traveler under special relativity, from the speed as a fraction of light speed.
- [Decibel Calculator](https://pressequals.com/calc/decibel-calculator): Add sound levels in decibels, or find how loud a sound is at a different distance from its source.
- [Voltage Divider Calculator](https://pressequals.com/calc/voltage-divider-calculator): Calculate the output voltage of a two-resistor voltage divider, the current through it and the power each resistor burns.
- [Speed of Sound Calculator](https://pressequals.com/calc/speed-of-sound-calculator): Find the speed of sound in air at any temperature, and how far away lightning is from the seconds between the flash and the thunder.
- [Beer–Lambert Law Calculator](https://pressequals.com/calc/beer-lambert-calculator): Use A = εlc to find absorbance, concentration or the molar absorptivity, and convert absorbance to percent transmittance.
- [Battery mAh to Wh Calculator](https://pressequals.com/calc/battery-wh-calculator): Convert a battery’s mAh rating to watt-hours, check whether a power bank is allowed on a plane, and estimate how many phone charges it holds.
- [Three-Phase Power Calculator](https://pressequals.com/calc/three-phase-power-calculator): Calculate kW, kVA and amps for three-phase or single-phase power from voltage, current and power factor.

## Health & fitness

- [BMI Calculator](https://pressequals.com/calc/bmi): Body mass index from height and weight. Uses metric (kg, cm) or imperial (lb, ft/in) and shows category: underweight, normal, overweight, obese.
- [BMR / Calorie Calculator](https://pressequals.com/calc/bmr): Basal metabolic rate and daily calories at rest. Choose Mifflin-St Jeor, Harris-Benedict, or Katch-McArdle; add activity level for TDEE.
- [Calories Burned Calculator](https://pressequals.com/calc/calories-burned): Estimate calories burned in a single session by activity type and duration. Uses MET (metabolic equivalent); enter weight, minutes, and activity (walk, run, bike, etc.).
- [Body Fat Percentage Calculator](https://pressequals.com/calc/body-fat): Estimate body fat % with the U.S. Navy method. Enter sex, height, weight, and circumferences (waist, neck; hip for females) in cm.
- [Water Intake Calculator](https://pressequals.com/calc/water-intake): Recommended daily water intake by weight and activity level. Simple guideline in liters (and cups); adjust for thirst and climate.
- [TDEE / Macros Calculator](https://pressequals.com/calc/tdee): Total daily energy expenditure and target calories for maintain, lose, or gain. Includes zigzag option and suggested protein, carbs, and fat.
- [Target Heart Rate Calculator](https://pressequals.com/calc/target-heart-rate): Target zones by age and intensity.
- [Pregnancy Due Date Calculator](https://pressequals.com/calc/pregnancy-due-date): Due date from last period or conception.
- [Sleep Calculator](https://pressequals.com/calc/sleep): Wake times for full sleep cycles.
- [Ideal Weight Calculator](https://pressequals.com/calc/ideal-weight-calculator): Ideal body weight by height and frame.
- [Pregnancy Weight Gain Calculator](https://pressequals.com/calc/pregnancy-weight-gain-calculator): Recommended pregnancy weight gain.
- [Pace Calculator](https://pressequals.com/calc/pace-calculator): Running pace (min/mile or min/km).
- [Army Body Fat Calculator](https://pressequals.com/calc/army-body-fat-calculator): US Army body fat percentage formula.
- [Carbohydrate Calculator](https://pressequals.com/calc/carbohydrate-calculator): Daily carb needs.
- [Lean Body Mass Calculator](https://pressequals.com/calc/lean-body-mass-calculator): Lean body mass from weight and body fat.
- [One Rep Max Calculator](https://pressequals.com/calc/one-rep-max-calculator): 1RM strength estimate.
- [Protein Calculator](https://pressequals.com/calc/protein-calculator): Daily protein needs.
- [Fat Intake Calculator](https://pressequals.com/calc/fat-intake-calculator): Daily fat intake (grams/calories).
- [Ovulation Calculator](https://pressequals.com/calc/ovulation-calculator): Estimated ovulation and fertile window.
- [Conception Calculator](https://pressequals.com/calc/conception-calculator): Conception date from due date.
- [Period Calculator](https://pressequals.com/calc/period-calculator): Next period and cycle length.
- [GFR Calculator](https://pressequals.com/calc/gfr-calculator): Estimated kidney function (eGFR).
- [Body Type Calculator](https://pressequals.com/calc/body-type-calculator): Body shape/somatotype (simplified).
- [Body Surface Area Calculator](https://pressequals.com/calc/body-surface-area-calculator): BSA (Mosteller formula).
- [BAC Calculator](https://pressequals.com/calc/bac-calculator): Blood alcohol content estimate.
- [Weight Watchers Points Calculator](https://pressequals.com/calc/weight-watchers-points-calculator): WW Points (simplified).
- [Overweight Calculator](https://pressequals.com/calc/overweight-calculator): How much over ideal weight (BMI-based).
- [Chipotle Calorie Calculator](https://pressequals.com/calc/chipotle-calorie-calculator): Add up calories for Chipotle or any meal items.
- [Waist-to-Hip Ratio Calculator](https://pressequals.com/calc/waist-hip-ratio): Waist-to-hip ratio and health risk category.
- [VO2 Max Calculator](https://pressequals.com/calc/vo2-max-calculator): Estimate VO2 max from resting heart rate (Uth) or Cooper test.
- [Weight Loss Calculator](https://pressequals.com/calc/weight-loss-calculator): Estimate how long it will take to reach your goal weight at a daily calorie deficit, and how much you’d lose each week.
- [Weight Loss Percentage Calculator](https://pressequals.com/calc/weight-loss-percentage-calculator): Calculate the percentage of body weight you’ve lost (or gained) between a starting and current weight.
- [Race Time Predictor](https://pressequals.com/calc/race-time-predictor): Predict your finish time for a 5K, 10K, half marathon or marathon from a recent race, using the Riegel formula, with the pace you’d need.
- [Steps to Miles Calculator](https://pressequals.com/calc/steps-to-miles-calculator): Convert steps to miles and kilometers using your height to estimate stride length, plus roughly how many calories the walk burned.
- [Waist-to-Height Ratio Calculator](https://pressequals.com/calc/waist-to-height-ratio-calculator): Calculate your waist-to-height ratio, a simple measure of belly fat linked to heart and metabolic risk. Keep your waist under half your height.
- [FFMI Calculator](https://pressequals.com/calc/ffmi-calculator): Calculate your fat-free mass index (FFMI) from height, weight and body fat, a muscularity measure that’s more useful than BMI for lifters.
- [Mean Arterial Pressure Calculator](https://pressequals.com/calc/mean-arterial-pressure-calculator): Calculate mean arterial pressure (MAP) and pulse pressure from a blood pressure reading, and see which blood pressure category it falls in.
- [Blood Sugar Converter](https://pressequals.com/calc/blood-sugar-converter): Convert blood glucose readings between mg/dL (used in the US) and mmol/L (used in the UK, Canada and most of the world).
- [A1C Calculator](https://pressequals.com/calc/a1c-calculator): Convert an A1C (HbA1c) result to estimated average glucose (eAG) in mg/dL and mmol/L, or go the other way, and see the diagnostic range.
- [Cholesterol Ratio Calculator](https://pressequals.com/calc/cholesterol-ratio-calculator): Calculate your total cholesterol to HDL ratio, non-HDL cholesterol and triglyceride to HDL ratio from a lipid panel.
- [Pack Years Calculator](https://pressequals.com/calc/pack-years-calculator): Calculate your smoking history in pack-years, the measure doctors use to decide on lung cancer screening.
- [Alcohol Units Calculator](https://pressequals.com/calc/alcohol-units-calculator): Count UK alcohol units and US standard drinks in what you drink, and compare a week’s drinking with the 14-unit guideline.
- [Child Height Predictor](https://pressequals.com/calc/child-height-predictor): Estimate how tall a child will be as an adult from the parents’ heights, using the mid-parental height method, with the usual range.
- [Body Roundness Index Calculator](https://pressequals.com/calc/body-roundness-index-calculator): Calculate your body roundness index (BRI) from waist and height, a newer alternative to BMI that better reflects belly fat.
- [IV Drip Rate Calculator](https://pressequals.com/calc/iv-drip-rate-calculator): Calculate an IV infusion rate in drops per minute (gtt/min) and mL per hour from the volume, time and tubing drop factor.
- [Caffeine Calculator](https://pressequals.com/calc/caffeine-calculator): Estimate how much caffeine is still in your system hours after a coffee or energy drink, using caffeine’s roughly five-hour half-life.
- [Pet Calorie Calculator](https://pressequals.com/calc/pet-calorie-calculator): Estimate how many calories your dog or cat needs per day from its weight and life stage, using the veterinary RER formula.
- [Creatinine Clearance Calculator](https://pressequals.com/calc/creatinine-clearance-calculator): Estimate creatinine clearance with the Cockcroft-Gault equation from age, weight, sex and serum creatinine, as used for drug dosing.
- [Watts per Kilogram Calculator](https://pressequals.com/calc/watts-per-kg-calculator): Calculate your cycling power-to-weight ratio (W/kg) from FTP and body weight, and see roughly where it ranks.
- [DOTS Calculator](https://pressequals.com/calc/dots-calculator): Calculate your powerlifting DOTS score from your total and body weight, to compare lifters across weight classes.
- [Dosage Calculator](https://pressequals.com/calc/dosage-calculator): Calculate a weight-based medication dose in mg and the liquid volume in mL from the dose per kilogram and the concentration.
- [Dog Chocolate Toxicity Calculator](https://pressequals.com/calc/dog-chocolate-toxicity-calculator): Estimate how dangerous the chocolate your dog ate is, from the dog’s weight, the type of chocolate and how much.
- [Macro Calculator](https://pressequals.com/calc/macro-calculator): Split your daily calories into grams of protein, carbs and fat for a balanced, high-protein, low-carb or keto diet.
- [Anion Gap Calculator](https://pressequals.com/calc/anion-gap-calculator): Calculate the serum anion gap from sodium, chloride and bicarbonate, with an optional correction for low albumin.
- [Corrected Calcium Calculator](https://pressequals.com/calc/corrected-calcium-calculator): Correct a total serum calcium level for low or high albumin with the Payne formula.
- [QTc Calculator](https://pressequals.com/calc/qtc-calculator): Correct the QT interval for heart rate with the Bazett, Fridericia, Framingham and Hodges formulas.
- [Calorie Deficit Calculator](https://pressequals.com/calc/calorie-deficit-calculator): Work out the daily calorie deficit and calorie target to lose a set amount of weight by a set number of weeks, with a warning if the pace is too fast.
- [Keto Macro Calculator](https://pressequals.com/calc/keto-calculator): Split your daily calories into keto macros: a carb limit, a protein target and the fat that fills the rest, in grams and percentages.
- [Intermittent Fasting Calculator](https://pressequals.com/calc/intermittent-fasting-calculator): Pick a fasting plan like 16:8 and the time of your last meal to see when your fast ends and when your eating window closes.
- [Heart Rate Zones Calculator](https://pressequals.com/calc/heart-rate-zones-calculator): Find your five heart rate training zones from your age and resting heart rate, using the Karvonen heart rate reserve method or a simple percent of max.
- [Blood Pressure Category Calculator](https://pressequals.com/calc/blood-pressure-calculator): Enter a blood pressure reading to see whether it is normal, elevated, stage 1 or stage 2 high blood pressure, or a crisis, by American Heart Association categories.
- [Fiber Intake Calculator](https://pressequals.com/calc/fiber-intake-calculator): Find how much fiber you should eat each day based on your calories, and how far you are from that goal.
- [Alcohol Calories Calculator](https://pressequals.com/calc/alcohol-calories-calculator): Add up the calories in the beer, wine, spirits and cocktails you drink in a week, and see what that adds up to over a year.
- [Steps to Calories Calculator](https://pressequals.com/calc/steps-to-calories-calculator): Estimate how many calories you burn walking a number of steps, from your weight, height and walking pace.
- [Sweat Rate Calculator](https://pressequals.com/calc/sweat-rate-calculator): Work out how much fluid you lose per hour of exercise by weighing yourself before and after, so you know how much to drink.
- [Swim Pace Calculator](https://pressequals.com/calc/swim-pace-calculator): Find your swimming pace per 100 meters or yards from a distance and time, and predict your time for other distances.
- [Baby Formula Calculator](https://pressequals.com/calc/baby-formula-calculator): Estimate how much formula a baby needs each day and per feeding, from their weight and how often they eat.

## Home improvement & construction

- [Gravel Calculator](https://pressequals.com/calc/gravel): Estimate gravel or aggregate volume by length, width, depth, and waste %. Results in cubic yards, cubic feet, and cubic meters for ordering.
- [Concrete Calculator](https://pressequals.com/calc/concrete): Estimate concrete volume and number of 60 lb or 80 lb bags. Enter length, width, depth (inches), and optional waste % for slabs and footings.
- [Paint Calculator](https://pressequals.com/calc/paint): Estimate paint needed for walls by room length, width, height, number of coats, and coverage (sq ft per gallon). Results in gallons and liters.
- [Roof Pitch Calculator](https://pressequals.com/calc/roof-pitch): Roof pitch ratio and angle.
- [Deck Board Calculator](https://pressequals.com/calc/deck-boards): Number of boards needed for a deck.
- [Fence Material Calculator](https://pressequals.com/calc/fence): Posts and panels for a fence.
- [Tile Calculator](https://pressequals.com/calc/tile): Tiles needed for floor or wall.
- [Drywall Calculator](https://pressequals.com/calc/drywall): Drywall sheets needed for a room.
- [Pavers Calculator](https://pressequals.com/calc/pavers): Pavers needed for a patio or path.
- [Square Footage Calculator](https://pressequals.com/calc/square-footage-calculator): Area in square feet.
- [Roofing Calculator](https://pressequals.com/calc/roofing-calculator): Roof area, squares and shingle bundles from your house size and roof pitch, plus underlayment, ridge cap and drip edge for gable or hip roofs.
- [Mulch Calculator](https://pressequals.com/calc/mulch-calculator): Mulch needed for area.
- [Topsoil Calculator](https://pressequals.com/calc/topsoil): Estimate topsoil needed by area and depth.
- [Pool Volume Calculator](https://pressequals.com/calc/pool-volume-calculator): Calculate pool volume in gallons from length, width, and average depth.
- [Carpet Calculator](https://pressequals.com/calc/carpet-calculator): Square footage of carpet needed from room dimensions plus waste %.
- [Wallpaper Calculator](https://pressequals.com/calc/wallpaper-calculator): Rolls of wallpaper needed from room dimensions and roll coverage.
- [Stair Calculator](https://pressequals.com/calc/stair-calculator): Calculate number of steps, rise per step, and run per step from total rise.
- [Lawn Fertilizer Calculator](https://pressequals.com/calc/lawn-fertilizer-calculator): Pounds of fertilizer needed from lawn area and application rate.
- [Concrete Block Calculator](https://pressequals.com/calc/concrete-block-calculator): Number of CMU blocks for a wall from length, height, and block size.
- [Brick Calculator](https://pressequals.com/calc/brick-calculator): Estimate how many bricks, mortar bags and dollars a brick wall needs from its size, the brick type and the mortar joint.
- [Asphalt Calculator](https://pressequals.com/calc/asphalt-calculator): Work out how many tons of asphalt a driveway or parking area needs, and what it costs, from the length, width and thickness.
- [Board Foot Calculator](https://pressequals.com/calc/board-foot-calculator): Calculate board feet of lumber from thickness, width and length, and the total price for a stack of boards.
- [Flooring Calculator](https://pressequals.com/calc/flooring-calculator): Find how many boxes of laminate, vinyl plank, hardwood or tile flooring to buy for a room, including waste, and the total cost.
- [Insulation Calculator](https://pressequals.com/calc/insulation-calculator): Work out how deep insulation must be to reach a target R-value, how much you need for an attic or wall, and the cost.
- [Siding Calculator](https://pressequals.com/calc/siding-calculator): Estimate how many squares of vinyl, fiber cement or wood siding a house needs, after windows and doors, and the cost.
- [Retaining Wall Calculator](https://pressequals.com/calc/retaining-wall-calculator): Count the blocks, cap stones and gravel backfill for a segmental retaining wall from its length and height.
- [Sod Calculator](https://pressequals.com/calc/sod-calculator): Work out how many rolls or pallets of sod to order for a lawn, with a little extra for cuts, and what it will cost.
- [Grass Seed Calculator](https://pressequals.com/calc/grass-seed-calculator): Find how many pounds and bags of grass seed you need to plant a new lawn or overseed an existing one, by grass type.
- [Solar Panel Calculator](https://pressequals.com/calc/solar-panel-calculator): Estimate the solar system size, number of panels, cost and payback period to cover your electricity use, from your bill and local sun hours.
- [Pool Chlorine Calculator](https://pressequals.com/calc/pool-chlorine-calculator): Find how much liquid chlorine, cal-hypo, dichlor or trichlor to add to raise your pool’s free chlorine to a target level.
- [Cubic Yard Calculator](https://pressequals.com/calc/cubic-yard-calculator): Convert length, width and depth into cubic yards, cubic feet and cubic meters for dirt, mulch, gravel, concrete or any bulk material.
- [Square Yards Calculator](https://pressequals.com/calc/square-yards-calculator): Convert a room’s length and width in feet into square yards, the unit carpet and some flooring is priced in, plus the cost.
- [Cubic Feet Calculator](https://pressequals.com/calc/cubic-feet-calculator): Calculate cubic feet from length, width and height in inches, feet, yards or meters, for boxes, rooms, moving trucks and freezers.
- [Raised Bed Soil Calculator](https://pressequals.com/calc/raised-bed-soil-calculator): Work out how much soil fills your raised garden beds, in cubic feet, cubic yards and bags, with a simple compost mix.
- [Plant Spacing Calculator](https://pressequals.com/calc/plant-spacing-calculator): Find how many plants fit in a bed or field at a given spacing, in square or staggered (triangular) rows.
- [Baseboard Calculator](https://pressequals.com/calc/baseboard-calculator): Estimate the linear feet and number of boards of baseboard or crown molding for a room, after doorways and waste.
- [Concrete Column Calculator](https://pressequals.com/calc/concrete-column-calculator): Calculate the concrete and number of bags for round columns, post holes and Sonotube footings from diameter, depth and count.
- [Stud Calculator](https://pressequals.com/calc/stud-calculator): Count the studs and plates to frame a wall from its length, stud spacing, corners and openings.
- [Rafter Length Calculator](https://pressequals.com/calc/rafter-length-calculator): Calculate common rafter length, roof angle and ridge height from the building span, roof pitch and overhang.
- [Generator Size Calculator](https://pressequals.com/calc/generator-size-calculator): Add up the running and starting watts of what you want to power in an outage to choose the right portable or standby generator.
- [Tank Volume Calculator](https://pressequals.com/calc/tank-volume-calculator): Find the capacity of a round or rectangular tank in gallons and liters, and how much is in it at a given fill height, including horizontal tanks.
- [Pipe Volume Calculator](https://pressequals.com/calc/pipe-volume-calculator): Find how much water a length of pipe holds in gallons and liters, and what that water weighs, from the inside diameter and length.
- [Firewood Cord Calculator](https://pressequals.com/calc/firewood-calculator): Measure a stack of firewood to find how many full cords and face cords it is, and what it should cost.

## Automotive & travel

- [Fuel Cost Calculator](https://pressequals.com/calc/fuel-cost): Trip fuel cost from distance and MPG.
- [Gas Mileage Calculator](https://pressequals.com/calc/gas-mileage): MPG from distance and gallons used.
- [Car Loan Calculator](https://pressequals.com/calc/car-loan): Monthly payment for a car loan.
- [Trip Distance & Time Calculator](https://pressequals.com/calc/trip-time): Drive time from distance and speed.
- [Tire Size Converter](https://pressequals.com/calc/tire-size): Convert tire dimensions.
- [MPG to L/100km Converter](https://pressequals.com/calc/mpg-converter): Convert fuel economy units.
- [True Cost of Car Ownership](https://pressequals.com/calc/true-cost-car): Real cost: payment, insurance, fuel, maintenance, depreciation.
- [EV Charging Cost Calculator](https://pressequals.com/calc/ev-charging-cost): Cost to charge an electric vehicle at home.
- [Car Depreciation Calculator](https://pressequals.com/calc/car-depreciation-calculator): Estimate what your car will be worth over the years and how much value it loses, with a faster drop in the first year like real cars.
- [How Much Car Can I Afford](https://pressequals.com/calc/car-affordability-calculator): Find a car price that fits your budget using the 20/4/10 rule: your loan payment, insurance and gas within a share of your income.
- [Lease Mileage Calculator](https://pressequals.com/calc/lease-mileage-calculator): Check whether you’re on track with your car lease mileage allowance, and estimate the overage charge at the end of the lease.
- [Gear Ratio Calculator](https://pressequals.com/calc/gear-ratio-calculator): Calculate a gear ratio from tooth counts, plus the output speed and torque, for gears, sprockets and pulleys.
- [Engine Displacement Calculator](https://pressequals.com/calc/engine-displacement-calculator): Calculate engine displacement in cc, liters and cubic inches from the bore, stroke and number of cylinders.
- [Compression Ratio Calculator](https://pressequals.com/calc/compression-ratio-calculator): Calculate an engine’s static compression ratio from bore, stroke, chamber volume, head gasket, deck clearance and piston volume.
- [Stopping Distance Calculator](https://pressequals.com/calc/stopping-distance-calculator): Estimate how far a car travels while the driver reacts and then brakes, at a given speed and on dry, wet, snowy or icy roads.
- [Gas Savings Calculator](https://pressequals.com/calc/gas-savings-calculator): Compare the fuel cost of two vehicles by their MPG and see how much a more efficient car saves you each year.
- [EV vs Gas Calculator](https://pressequals.com/calc/ev-vs-gas-calculator): Compare what you would spend fueling a gas car versus charging an electric car, per mile and per year.
- [Wheel Offset Calculator](https://pressequals.com/calc/wheel-offset-calculator): Compare two wheels by width and offset to see how much closer the new one sits to the suspension and how far it pokes out.
- [Gas Split Calculator](https://pressequals.com/calc/gas-split-calculator): Split the cost of gas, tolls and parking for a road trip or carpool between everyone in the car.

## Unit converters

- [Length Converter](https://pressequals.com/calc/length-converter): Convert length or distance between meters, feet, inches, yards, miles, kilometers, and centimeters. Enter value and choose from/to units.
- [Weight Converter](https://pressequals.com/calc/weight-converter): Convert lbs, kg, oz, etc.
- [Temperature Converter](https://pressequals.com/calc/temperature-converter): Fahrenheit, Celsius, Kelvin.
- [Speed Converter](https://pressequals.com/calc/speed-converter): mph, km/h, m/s, etc.
- [Digital Storage Converter](https://pressequals.com/calc/storage-converter): KB, MB, GB, TB.
- [Time Converter](https://pressequals.com/calc/time-converter): Hours, minutes, seconds.
- [Height Converter](https://pressequals.com/calc/height-calculator): Convert height (ft/in to cm).
- [Acres to Square Feet Converter](https://pressequals.com/calc/acres-to-square-feet): Convert acres to square feet.
- [Area Converter](https://pressequals.com/calc/area-converter): Convert area between square feet, square meters, acres, hectares, square yards, square miles and more.
- [Volume Converter](https://pressequals.com/calc/volume-converter): Convert liquid and dry volume: liters, milliliters, US and UK gallons, quarts, pints, cups, fluid ounces, tablespoons, cubic feet and more.
- [Pressure Converter](https://pressequals.com/calc/pressure-converter): Convert pressure between PSI, bar, kPa, atmospheres, mmHg, inches of mercury and pascals, for tires, weather, diving and engineering.
- [Energy Converter](https://pressequals.com/calc/energy-converter): Convert energy between joules, calories, kilocalories, kilowatt-hours, BTU, therms and foot-pounds.
- [Power Converter](https://pressequals.com/calc/power-converter): Convert power between watts, kilowatts, horsepower, metric horsepower (PS), BTU per hour and tons of refrigeration.
- [Angle Converter](https://pressequals.com/calc/angle-converter): Convert angles between degrees, radians, gradians, arcminutes, arcseconds and turns.
- [Internet Speed Converter (Mbps to MB/s)](https://pressequals.com/calc/data-transfer-rate-converter): Convert internet and data speeds between megabits per second (Mbps) and megabytes per second (MB/s), plus kbps, Gbps and more.
- [Force Converter](https://pressequals.com/calc/force-converter): Convert force between newtons, kilonewtons, pound-force, kilogram-force and dynes.
- [Torque Converter](https://pressequals.com/calc/torque-converter): Convert torque between newton-meters, pound-feet, pound-inches and kilogram-force meters, for bolts, engines and torque wrenches.
- [Kg to Lbs Converter](https://pressequals.com/calc/kg-to-lbs): Convert kilograms to pounds (kg to lb) instantly, with the formula and a quick conversion table.
- [Lbs to Kg Converter](https://pressequals.com/calc/lbs-to-kg): Convert pounds to kilograms (lb to kg) instantly, with the formula and a quick conversion table.
- [Cm to Inches Converter](https://pressequals.com/calc/cm-to-inches): Convert centimeters to inches (cm to in) instantly, with the formula and a quick conversion table.
- [Inches to Cm Converter](https://pressequals.com/calc/inches-to-cm): Convert inches to centimeters (in to cm) instantly, with the formula and a quick conversion table.
- [Feet to Meters Converter](https://pressequals.com/calc/feet-to-meters): Convert feet to meters (ft to m) instantly, with the formula and a quick conversion table.
- [Meters to Feet Converter](https://pressequals.com/calc/meters-to-feet): Convert meters to feet (m to ft) instantly, with the formula and a quick conversion table.
- [Miles to Km Converter](https://pressequals.com/calc/miles-to-km): Convert miles to kilometers (mi to km) instantly, with the formula and a quick conversion table.
- [Km to Miles Converter](https://pressequals.com/calc/km-to-miles): Convert kilometers to miles (km to mi) instantly, with the formula and a quick conversion table.
- [Mm to Inches Converter](https://pressequals.com/calc/mm-to-inches): Convert millimeters to inches (mm to in) instantly, with the formula and a quick conversion table.
- [Ounces to Grams Converter](https://pressequals.com/calc/oz-to-grams): Convert ounces to grams (oz to g) instantly, with the formula and a quick conversion table.
- [Grams to Ounces Converter](https://pressequals.com/calc/grams-to-oz): Convert grams to ounces (g to oz) instantly, with the formula and a quick conversion table.
- [Stone to Pounds Converter](https://pressequals.com/calc/stone-to-lbs): Convert stone to pounds (st to lb) instantly, with the formula and a quick conversion table.
- [Ml to Oz Converter](https://pressequals.com/calc/ml-to-oz): Convert milliliters to us fluid ounces (mL to fl oz) instantly, with the formula and a quick conversion table.
- [Oz to Ml Converter](https://pressequals.com/calc/oz-to-ml): Convert us fluid ounces to milliliters (fl oz to mL) instantly, with the formula and a quick conversion table.
- [Cups to Ml Converter](https://pressequals.com/calc/cups-to-ml): Convert us cups to milliliters (cups to mL) instantly, with the formula and a quick conversion table.
- [Liters to Gallons Converter](https://pressequals.com/calc/liters-to-gallons): Convert liters to us gallons (L to gal) instantly, with the formula and a quick conversion table.
- [Gallons to Liters Converter](https://pressequals.com/calc/gallons-to-liters): Convert us gallons to liters (gal to L) instantly, with the formula and a quick conversion table.
- [Mph to Km/h Converter](https://pressequals.com/calc/mph-to-kmh): Convert miles per hour to kilometers per hour (mph to km/h) instantly, with the formula and a quick conversion table.
- [Km/h to Mph Converter](https://pressequals.com/calc/kmh-to-mph): Convert kilometers per hour to miles per hour (km/h to mph) instantly, with the formula and a quick conversion table.
- [Square Feet to Square Meters Converter](https://pressequals.com/calc/sq-ft-to-sq-m): Convert square feet to square meters (sq ft to m²) instantly, with the formula and a quick conversion table.
- [Celsius to Fahrenheit Converter](https://pressequals.com/calc/celsius-to-fahrenheit): Convert Celsius to Fahrenheit (°C to °F) instantly, with the formula and a quick table of common temperatures.
- [Fahrenheit to Celsius Converter](https://pressequals.com/calc/fahrenheit-to-celsius): Convert Fahrenheit to Celsius (°F to °C) instantly, with the formula and a quick table of common temperatures.
- [Height Converter (Feet and Inches to Cm)](https://pressequals.com/calc/height-converter): Convert height between feet and inches and centimeters, either way, for forms, passports, dating apps and doctor visits.
- [Cooking Measurement Converter](https://pressequals.com/calc/cooking-converter): Convert recipe measurements between cups, tablespoons, teaspoons, milliliters, grams and ounces, with the right weight for flour, sugar, butter and more.
- [Text to Binary Converter](https://pressequals.com/calc/text-to-binary-converter): Convert text to binary, hexadecimal and decimal ASCII or UTF-8 codes, or decode binary back to readable text.
- [Dress Size Converter](https://pressequals.com/calc/dress-size-converter): Convert women’s dress and clothing sizes between U.S., UK, European, French, Italian and Australian sizing.

## Creator & tech tools

- [YouTube Revenue Calculator](https://pressequals.com/calc/youtube-revenue): Estimate YouTube ad revenue from views and CPM. Enter views and CPM ($ per 1000 views) to see estimated revenue before YouTube’s cut.
- [YouTube Bitrate Calculator](https://pressequals.com/calc/youtube-bitrate): Recommended bitrate for resolution and FPS. Choose upload or live, then resolution (1080p, 720p, 4K) and frame rate for encoding settings.
- [TikTok Earnings Calculator](https://pressequals.com/calc/tiktok-earnings): Estimate TikTok creator fund earnings.
- [Cron Expression Generator](https://pressequals.com/calc/cron-generator): Build cron expressions for schedules.
- [CPM Calculator](https://pressequals.com/calc/cpm-calculator): Work out cost per thousand impressions (CPM), cost per click and click-through rate for an ad campaign, or the budget for a given reach.
- [Engagement Rate Calculator](https://pressequals.com/calc/engagement-rate-calculator): Calculate the engagement rate of a social media post or account by followers or by reach, for Instagram, TikTok, YouTube or LinkedIn.
- [PX to REM Converter](https://pressequals.com/calc/px-to-rem-converter): Convert pixels to rem, em, points and percent for CSS, using any root font size, or rem back to pixels.
- [BPM to Milliseconds Calculator](https://pressequals.com/calc/bpm-to-ms-calculator): Convert a song’s tempo in BPM to delay and reverb times in milliseconds for whole, half, quarter, eighth and sixteenth notes, dotted and triplet.
- [Print Size Calculator](https://pressequals.com/calc/print-size-calculator): Find how large you can print a photo from its pixel size at a given DPI, or the pixels you need for a print size.

## Date & time

- [Age Calculator](https://pressequals.com/calc/age): Age in years, months, and days from birth date to today or another date. Useful for exact age or time-between calculations.
- [Date Difference Calculator](https://pressequals.com/calc/date-diff): Number of calendar days between two dates. Enter start and end date; result is the day count (full 24-hour periods).
- [Day of Week Finder](https://pressequals.com/calc/day-of-week): What day of the week is a date? Enter any date to get the weekday (Monday–Sunday).
- [Work Days Calculator](https://pressequals.com/calc/work-days): Count business days (Mon–Fri) between two dates. Does not exclude holidays; use for project timelines and contract periods.
- [Date Calculator](https://pressequals.com/calc/date-calculator): Add or subtract days from a date.
- [Time Calculator](https://pressequals.com/calc/time-calculator): Add or subtract time (hours, minutes).
- [Hours Calculator](https://pressequals.com/calc/hours-calculator): Hours between times or decimal hours.
- [Time Card Calculator](https://pressequals.com/calc/time-card-calculator): Work hours and overtime.
- [Time Zone Converter](https://pressequals.com/calc/time-zone-calculator): Convert time between zones.
- [Time Duration Calculator](https://pressequals.com/calc/time-duration-calculator): Duration between two times.
- [Week Number Calculator](https://pressequals.com/calc/week-number-calculator): Find the ISO week number for any date, plus the U.S. (Sunday-start) week number, the week’s Monday and Sunday, and the day of the year.
- [Day of the Year Calculator](https://pressequals.com/calc/day-of-year-calculator): Find what day of the year a date is (1 to 366), how many days are left in the year, and how far through the year you are.
- [Leap Year Calculator](https://pressequals.com/calc/leap-year-calculator): Check whether a year is a leap year, see the rule that decides it, and find the previous and next leap years.
- [Military Time Converter](https://pressequals.com/calc/military-time-converter): Convert standard 12-hour time with AM and PM to 24-hour military time, or military time back to standard time.
- [Time to Decimal Calculator](https://pressequals.com/calc/time-to-decimal-calculator): Convert hours, minutes and seconds into decimal hours for timesheets and payroll, plus total minutes and seconds.
- [Unix Timestamp Converter](https://pressequals.com/calc/unix-timestamp-converter): Convert a Unix (epoch) timestamp in seconds or milliseconds to a readable date and time in UTC, or a date and time to a timestamp.
- [Julian Date Converter](https://pressequals.com/calc/julian-date-converter): Convert a calendar date to the astronomical Julian Day number and to the YYDDD ordinal “Julian date” used in manufacturing, food dating and the military.
- [Age Difference Calculator](https://pressequals.com/calc/age-difference-calculator): Find the exact age gap between two people in years, months and days from their birthdays, and who is older.
- [Half Birthday Calculator](https://pressequals.com/calc/half-birthday-calculator): Find your half birthday, the date six months after your birthday, and how many days until the next one.
- [Zodiac Sign Calculator](https://pressequals.com/calc/zodiac-sign-calculator): Find your Western star sign, its element and dates, and your Chinese zodiac animal from your date of birth.
- [Moon Phase Calculator](https://pressequals.com/calc/moon-phase-calculator): See the phase of the moon on any date, how much of it is lit, its age in days, and the dates of the next full and new moons.
- [Full Retirement Age Calculator](https://pressequals.com/calc/full-retirement-age-calculator): Find your Social Security full retirement age and date from your birthday, and how much claiming at 62 or waiting until 70 changes your benefit.
- [PTO Accrual Calculator](https://pressequals.com/calc/pto-accrual-calculator): Work out how much paid time off you earn each pay period and per hour worked, and what your balance will be after a number of paychecks.
- [Sunrise and Sunset Calculator](https://pressequals.com/calc/sunrise-sunset-calculator): Find sunrise, sunset, solar noon and the length of the day for any date in a major city or at any latitude and longitude.
- [Days Until Calculator](https://pressequals.com/calc/days-until-calculator): Count the days until Christmas, New Year, Halloween, Thanksgiving, Easter, a birthday or any date, with weeks and the day of the week.

## Business & selling

- [Etsy Fee Calculator](https://pressequals.com/calc/etsy-fees): Calculate Etsy listing ($0.20) and transaction (6.5%) fees. Enter price, quantity, and shipping to see your net and total fees.
- [eBay Fee Calculator](https://pressequals.com/calc/ebay-fees): Calculate eBay selling fees: sale price, shipping, and final value fee %. See what you receive after fees.
- [Inventory Turnover Calculator](https://pressequals.com/calc/inventory-turnover-calculator): Calculate how many times you sell through your inventory in a year and how many days stock sits on the shelf, from cost of goods sold and inventory levels.
- [Customer Lifetime Value Calculator](https://pressequals.com/calc/customer-lifetime-value-calculator): Estimate customer lifetime value (CLV or LTV) from order value, purchase frequency, margin and how long customers stay, and compare it with what you pay to win them.
- [Churn Rate Calculator](https://pressequals.com/calc/churn-rate-calculator): Calculate customer churn and retention for a month or year, the annualized churn rate, and how long the average customer stays.
- [Conversion Rate Calculator](https://pressequals.com/calc/conversion-rate-calculator): Calculate your website or ad conversion rate, revenue per visitor, and how many more sales a higher conversion rate would bring.
- [ROAS Calculator](https://pressequals.com/calc/roas-calculator): Calculate return on ad spend, your break-even ROAS from your profit margin, and whether a campaign is actually making money.
- [PayPal Fee Calculator](https://pressequals.com/calc/paypal-fee-calculator): Work out the PayPal fee on a payment, what you receive, and how much to charge so you get the full amount after fees.
- [Stripe Fee Calculator](https://pressequals.com/calc/stripe-fee-calculator): Work out the Stripe fee on a payment, what you receive, and how much to charge so you get the full amount after fees.
- [Employee Cost Calculator](https://pressequals.com/calc/employee-cost-calculator): Work out the true yearly cost of an employee to a U.S. business: salary plus payroll taxes, benefits and overhead, and the real hourly cost.
- [Contribution Margin Calculator](https://pressequals.com/calc/contribution-margin-calculator): Calculate contribution margin per unit and as a ratio, the break-even units and sales, and profit at a given volume.
- [EBITDA Calculator](https://pressequals.com/calc/ebitda-calculator): Calculate EBITDA and EBITDA margin from net income, or from revenue and operating expenses, plus an enterprise value at a chosen multiple.
- [Venmo Fee Calculator](https://pressequals.com/calc/venmo-fee-calculator): Work out the Venmo fee for an instant transfer, a goods and services payment or a credit card payment, and how much to ask for to receive a set amount.
- [Cash App Fee Calculator](https://pressequals.com/calc/cash-app-fee-calculator): Work out the Cash App fee for an instant deposit, a business payment or a credit card payment, and what you take home.
- [Square Fee Calculator](https://pressequals.com/calc/square-fee-calculator): Calculate Square’s processing fee on in-person, online, invoice and keyed-in card payments, and what to charge to cover the fee.
- [EOQ Calculator](https://pressequals.com/calc/eoq-calculator): Find the economic order quantity, the order size that keeps the total cost of ordering and storing inventory as low as possible.
- [Reorder Point Calculator](https://pressequals.com/calc/reorder-point-calculator): Find the stock level at which to reorder so you don’t run out, from daily sales, supplier lead time and safety stock.
- [NPS Calculator](https://pressequals.com/calc/nps-calculator): Calculate your Net Promoter Score from the number of promoters, passives and detractors in a survey.
- [CTR Calculator](https://pressequals.com/calc/ctr-calculator): Calculate click-through rate, cost per click and cost per thousand impressions for an ad, email or search result.
- [Employee Turnover Rate Calculator](https://pressequals.com/calc/employee-turnover-calculator): Calculate employee turnover rate for a month, quarter or year from the number of people who left and your headcount.

## Games & hobbies

- [D&D Dice Probability](https://pressequals.com/calc/dice-probability): Probability distribution for d4, d6, d8, d10, d12, d20. Add modifier and optional target (meet or exceed) for tabletop gaming.
- [Dice Roller](https://pressequals.com/calc/dice-roller): Roll any number of d4, d6, d8, d10, d12, d20 or d100 dice with a modifier. Fair rolls from a secure random source, with each die shown.
- [Coin Flipper](https://pressequals.com/calc/coin-flipper): Flip virtual coins (heads or tails).
- [Cat Age Calculator](https://pressequals.com/calc/cat-age-calculator): Convert your cat’s age to human years using the vets’ guideline: 15 for the first year, 24 at two, then about 4 years for each year after.
- [Epoxy Resin Calculator](https://pressequals.com/calc/epoxy-resin-calculator): Calculate how much epoxy resin to mix for a river table, tabletop pour, mold or coating, in ounces, gallons and liters.
- [Recipe Scaler](https://pressequals.com/calc/recipe-scaler): Scale a recipe up or down to any number of servings. Paste the ingredient list and every amount is multiplied, fractions included.
- [Turkey Cooking Time Calculator](https://pressequals.com/calc/turkey-cooking-time-calculator): Find how long to roast a turkey at 325°F by weight, stuffed or not, and how long it takes to thaw in the fridge or cold water.
- [Coffee Ratio Calculator](https://pressequals.com/calc/coffee-ratio-calculator): Work out how much ground coffee to use for any amount of water, with ratios for drip, pour-over, French press, cold brew and espresso.
- [Pizza Dough Calculator](https://pressequals.com/calc/pizza-dough-calculator): Calculate flour, water, salt and yeast in grams for any number of pizzas, using baker’s percentages for hydration.
- [ABV Calculator](https://pressequals.com/calc/abv-calculator): Calculate alcohol by volume (ABV) for homebrewed beer, wine, cider or mead from the original and final gravity readings.
- [Bike Size Calculator](https://pressequals.com/calc/bike-size-calculator): Find the right road or mountain bike frame size from your inseam, with the matching size letter.
- [Ski and Snowboard Size Calculator](https://pressequals.com/calc/ski-size-calculator): Find the right ski length or snowboard length for your height, ability and riding style.
- [Cake Pan Size Converter](https://pressequals.com/calc/cake-pan-converter): Scale a recipe from one baking pan to another, such as a 9-inch round to a 9×13, by comparing the pan areas.
- [Bread Hydration Calculator](https://pressequals.com/calc/bread-hydration-calculator): Calculate dough hydration and baker’s percentages for bread and sourdough, counting the flour and water in your starter.
- [Brine Calculator](https://pressequals.com/calc/brine-calculator): Work out how much salt to add for a brine of any strength, for fermenting pickles and sauerkraut or brining a turkey.
- [Note Frequency Calculator](https://pressequals.com/calc/note-frequency-calculator): Find the musical note closest to a frequency in hertz, how many cents sharp or flat it is, and its MIDI number.
- [Depth of Field Calculator](https://pressequals.com/calc/depth-of-field-calculator): Find how much of a photo will be in focus, the near and far limits and the hyperfocal distance, from the lens, aperture, distance and camera.
- [Aquarium Volume Calculator](https://pressequals.com/calc/aquarium-calculator): Find how many gallons and liters a fish tank holds, how much the water weighs and a rough stocking guide.

## Everyday tools

- [IP Subnet Calculator](https://pressequals.com/calc/ip-subnet-calculator): Subnet mask and CIDR.
- [Bra Size Calculator](https://pressequals.com/calc/bra-size-calculator): Bra size from measurements.
- [Password Generator](https://pressequals.com/calc/password-generator): Generate secure random password.
- [BTU Calculator](https://pressequals.com/calc/btu-calculator): BTUs needed for room size.
- [Love Calculator](https://pressequals.com/calc/love-calculator): Fun compatibility percentage.
- [GDP Calculator](https://pressequals.com/calc/gdp-calculator): GDP growth rate and real GDP.
- [Horsepower Calculator](https://pressequals.com/calc/horsepower-calculator): Horsepower from torque and RPM.
- [Engine Horsepower Calculator](https://pressequals.com/calc/engine-horsepower-calculator): Engine HP estimate.
- [Electricity Calculator](https://pressequals.com/calc/electricity-calculator): Power cost (kWh × rate).
- [Shoe Size Converter](https://pressequals.com/calc/shoe-size-converter): US, UK, EU shoe sizes.
- [Roman Numeral Converter](https://pressequals.com/calc/roman-numeral-converter): Number to Roman numerals.
- [Golf Handicap Calculator](https://pressequals.com/calc/golf-handicap-calculator): Handicap index (simplified).
- [Wind Chill Calculator](https://pressequals.com/calc/wind-chill-calculator): Wind chill from temp and wind speed.
- [Heat Index Calculator](https://pressequals.com/calc/heat-index-calculator): Heat index from temp and humidity.
- [Dew Point Calculator](https://pressequals.com/calc/dew-point-calculator): Dew point from temp and humidity.
- [Bandwidth Calculator](https://pressequals.com/calc/bandwidth-calculator): Download time from size and speed.
- [Dimensional Weight Calculator](https://pressequals.com/calc/dimensional-weight): Freight dimensional (volumetric) weight and billable weight.
- [DoorDash Net Income Calculator](https://pressequals.com/calc/doordash-income): Estimate net income after expenses for gig delivery.
- [Map Scale Calculator](https://pressequals.com/calc/map-scale-calculator): Convert map distance to real distance using scale (e.g. 1:1000).
- [Numbers to Words Converter](https://pressequals.com/calc/numbers-to-words): Convert a number to words (e.g. for checks).
- [Character Counter](https://pressequals.com/calc/character-counter): Count characters, words, and lines in text.
- [Word Counter](https://pressequals.com/calc/word-counter): Count words and characters in text.
- [Dog Age Calculator](https://pressequals.com/calc/dog-age-calculator): Convert dog years to human years using the newer logarithmic method.
- [Reading Time Calculator](https://pressequals.com/calc/reading-time-calculator): Estimate reading time from word count (average 238 wpm).
- [Typing Speed Calculator](https://pressequals.com/calc/typing-speed-calculator): Calculate WPM and accuracy from characters typed, time, and errors.
- [Screen Size Calculator](https://pressequals.com/calc/screen-size-calculator): Calculate width and height from diagonal and aspect ratio.
- [Aspect Ratio Calculator](https://pressequals.com/calc/aspect-ratio-calculator): Calculate missing dimension from aspect ratio (e.g. 16:9).
- [Hex to RGB Converter](https://pressequals.com/calc/hex-rgb-converter): Convert between hex color codes and RGB values.
- [DPI Calculator](https://pressequals.com/calc/dpi-calculator): Calculate DPI/PPI from resolution and physical screen size.
- [Weight on Other Planets Calculator](https://pressequals.com/calc/weight-on-other-planets): Find out what you would weigh on the Moon, Mars, Jupiter and every other planet in the solar system.
- [Random Name Picker](https://pressequals.com/calc/random-name-picker): Pick one or more names at random from a list, with no repeats, for raffles, giveaways, classrooms and team draws.
- [Batting Average Calculator](https://pressequals.com/calc/batting-average-calculator): Calculate batting average, on-base percentage, slugging percentage and OPS for baseball or softball.
- [ERA Calculator](https://pressequals.com/calc/era-calculator): Calculate a pitcher’s earned run average (ERA) and WHIP from earned runs, innings pitched, walks and hits.
- [Winning Percentage Calculator](https://pressequals.com/calc/winning-percentage-calculator): Calculate a team’s winning percentage from wins, losses and ties, the way standings show it.
- [Uptime Calculator](https://pressequals.com/calc/uptime-calculator): Convert an uptime or SLA percentage, like 99.9% or 99.99%, into allowed downtime per day, week, month and year.
- [Morse Code Translator](https://pressequals.com/calc/morse-code-translator): Translate text to Morse code or decode Morse code back to text, using International Morse with letters, numbers and punctuation.
- [Text Case Converter](https://pressequals.com/calc/text-case-converter): Convert text to UPPERCASE, lowercase, Title Case, Sentence case, camelCase, snake_case or kebab-case in one click.
- [Wedding Alcohol Calculator](https://pressequals.com/calc/wedding-alcohol-calculator): Estimate how many bottles of wine, cases of beer and bottles of liquor to buy for a wedding or party from the guest count and hours.
- [Pizza Party Calculator](https://pressequals.com/calc/pizza-party-calculator): Work out how many pizzas to order for a party from the number of adults and kids, how hungry they are and the pizza size.
- [Ring Size Calculator](https://pressequals.com/calc/ring-size-calculator): Find your ring size from a finger measurement or convert between U.S., UK and European (ISO) ring sizes.
- [Hat Size Calculator](https://pressequals.com/calc/hat-size-calculator): Turn your head measurement into a U.S. fitted hat size, a UK size, a metric size and S/M/L.
- [Readability Score Calculator](https://pressequals.com/calc/readability-calculator): Paste text to get its Flesch reading ease score and Flesch-Kincaid grade level, with word, sentence and syllable counts.
- [Color Contrast Checker](https://pressequals.com/calc/color-contrast-checker): Check the contrast ratio between a text color and a background color, and whether it passes WCAG AA and AAA accessibility rules.
- [Base64 Encoder and Decoder](https://pressequals.com/calc/base64-encoder): Encode text to Base64 or decode Base64 back to text, with full support for emoji and accented characters.
- [URL Encoder and Decoder](https://pressequals.com/calc/url-encoder): Percent-encode text so it is safe to put in a URL or query string, or decode a percent-encoded URL back to readable text.
- [UUID Generator](https://pressequals.com/calc/uuid-generator): Generate random version 4 UUIDs (GUIDs), one or many at a time, in lowercase or uppercase.
- [Random Team Generator](https://pressequals.com/calc/random-team-generator): Split a list of names into random, evenly sized teams or groups for games, classrooms and work projects.
- [TV Size and Viewing Distance Calculator](https://pressequals.com/calc/tv-viewing-distance-calculator): Find the best seating distance for your TV size, or the best TV size for how far away you sit, using SMPTE and THX guidelines.