Everyday tools calculators
Tips, passwords, subnets, BTUs, text counters and more.
- Aspect Ratio CalculatorCalculate missing dimension from aspect ratio (e.g. 16:9).
- Bandwidth CalculatorDownload time from size and speed.
- Bra Size CalculatorBra size from measurements.
- BTU CalculatorBTUs needed for room size.
- Character CounterCount characters, words, and lines in text.
- Dew Point CalculatorDew point from temp and humidity.
- Dimensional Weight CalculatorFreight dimensional (volumetric) weight and billable weight.
- Dog Age CalculatorConvert dog years to human years using the newer logarithmic method.
- DoorDash Net Income CalculatorEstimate net income after expenses for gig delivery.
- DPI CalculatorCalculate DPI/PPI from resolution and physical screen size.
- Electricity CalculatorPower cost (kWh × rate).
- Engine Horsepower CalculatorEngine HP estimate.
- GDP CalculatorGDP growth rate and real GDP.
- Golf Handicap CalculatorHandicap index (simplified).
- Heat Index CalculatorHeat index from temp and humidity.
- Hex to RGB ConverterConvert between hex color codes and RGB values.
- Horsepower CalculatorHorsepower from torque and RPM.
- IP Subnet CalculatorSubnet mask and CIDR.
- Love CalculatorFun compatibility percentage.
- Map Scale CalculatorConvert map distance to real distance using scale (e.g. 1:1000).
- Numbers to Words ConverterConvert a number to words (e.g. for checks).
- Password GeneratorGenerate secure random password.
- Reading Time CalculatorEstimate reading time from word count (average 238 wpm).
- Roman Numeral ConverterNumber to Roman numerals.
- Screen Size CalculatorCalculate width and height from diagonal and aspect ratio.
- Shoe Size ConverterUS, UK, EU shoe sizes.
- Typing Speed CalculatorCalculate WPM and accuracy from characters typed, time, and errors.
- Weight on Other Planets CalculatorFind out what you would weigh on the Moon, Mars, Jupiter and every other planet in the solar system.
- Wind Chill CalculatorWind chill from temp and wind speed.
- Word CounterCount words and characters in text.
Miscellaneous calculators that don't fit the main categories: one-off tools, novelty calculators, and specialized helpers. Use them for quick answers, fun, or when you need a single specific calculation. Check each tool's description for what it does and any limitations.
Who they're for: Anyone who needs a one-off conversion, estimate, or bit of fun. Some tools are for entertainment only; others are practical but niche.
Common use cases: Depends on the tool—ranging from serious (e.g. dimensional weight, penalties) to for-fun (e.g. love calculator). Read the tool page for formulas and disclaimers.