Probability Calculator

Calculate basic probability using favorable and total outcomes.

Probability Gauge

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Switch display: percent, fraction, or odds.

0%—100%

Favorable outcomes

How many outcomes you want.

Total outcomes

Total possible outcomes.

P(A)

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P(not A)

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Fraction (reduced)

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Odds: —

Result—

Example: favorable 1, total 6 → 16.67%

Formula

P(A) = favorable / total • P(not A) = 1 − P(A)