Free Bayes Rule Calculator - Calculates the conditional probabilities of (B given A) of 2 events and a conditional probability event using Bayes Rule

This calculator has 3 inputs.

This calculator has 3 inputs.

P(B | A) = P(A | B) x P(B)/(P(A | B) x P(B) + P(A | B') x P(B'))

P(B') = 1 - P(B)

P(A') = 1 - P(A)

For more math formulas, check out our Formula Dossier

P(B') = 1 - P(B)

P(A') = 1 - P(A)

For more math formulas, check out our Formula Dossier

- bayes rule
- Probability of an event, based on existing preconditions of other events
- event
- a set of outcomes of an experiment to which a probability is assigned.
- probability
- the likelihood of an event happening. This value is always between 0 and 1.

P(Event Happening) = Number of Ways the Even Can Happen / Total Number of Outcomes