Probability Calculator
Calculate the probability of a single event. Enter the number of favorable outcomes and total outcomes.
Probability
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Decimal
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Percentage
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Probability Formula
P(A) = Number of favorable outcomes / Total number of outcomes
Rolling a die and getting an even number:
Favorable = 3 (2, 4, 6), Total = 6
P = 3/6 = 0.5 = 50%
Favorable = 3 (2, 4, 6), Total = 6
P = 3/6 = 0.5 = 50%
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Last updated: 2026-08-08