​
Bayes' Theorem Calculator
Enter probabilities as decimals from 0 to 1
(Figures are recalculated when exiting any input field.)
Prior probability of
H
1
P(​
H
1
​)
0.5
Probability of E given
H
1
P(E|
H
1
​)
0.5
Probability of E given
H
2
P(E|
H
2
​)
0.5
Hypotheses
H
1
H
2
Prior Probability of Hypotheses
0.5
0.5
Probability of E given Hypotheses
0.5
0.5
Probability of Hypotheses given E
0.5
0.5
H
1
and
H
2
are competing hypotheses. E is the evidence.