Probability Calculator
Basic probability (single event).
Result
Probability
30%
Common questions
How do I calculate basic probability?
Probability = Number of favorable outcomes ÷ Total number of possible outcomes. For example, drawing a heart from a standard deck: 13/52 = 0.25 or 25%.
What is the difference between independent and dependent events?
Independent events don't affect each other (coin flips). Dependent events do (drawing cards without replacement). For independent events, multiply individual probabilities.