Enter the values of probabilities between 0% and 100%

​Bayes Theorem Calculator

Bayes theorem defines the event occurrence probability associated with unspecified/any condition. In the case of conditional probability, you can use this theorem. it is also known as the probability's formula of "causes".

Suppose the group of all the events associated with a unit space S is denoted by; E1, E2,…, En, where every event has a nonzero occurrence's probability and creates an S partition.


Formula of ​Bayes Theorem Calculator

For any k = 1, 2, 3,., n

Proof of Bayes Theorem

P(B|A) = [P(A|B) * P(B)] / P(A)
P(A|B) = [P(B|A) * P(A)] / [P(A) * P(B|A) + P(not A)* P(B|not A)]


To know about exponential distribution, you can use our Exponential Distribution Calculator.

How to use ​Bayes Theorem Calculator?

The steps to use ​the Bayes theorem calculator are as follows:

Step 1: Choose what you want to calculate first.

Step 2: Enter the required values in the needed inputs.

Step 3: The calculator will automatically display an answer on the screen.

Calculator use

In conclusion, we aim to produce the free and most valuable Bayes theorem calculator that provides output in a few seconds on screen. For using this calculator, you have to put the expected values. After that, our algorithm will provide the most prescribed answer for you.