Independent Events
Probability of Event A (P(A)): 0.4; Probability of Event B (P(B)): 0.6; Probability of A and B (P(A and B)): 0.24
Probability of A given B (P(A|B)): 0.4; Probability of B given A (P(B|A)): 0.6
Conditional Probability Calculator
Math0.0(0)
Calculates the probability of an event occurring given that another event has already occurred.
More tools:Math & Statistics Calculators
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Probability of Event A (P(A)), Probability of Event B (P(B)), and Probability of A and B (P(A and B)) in the units shown.
Step 2
Read Probability of A given B (P(A|B)) and Probability of B given A (P(B|A)) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Dependent Events - Example 1
Probability of Event A (P(A)): 0.5; Probability of Event B (P(B)): 0.4; Probability of A and B (P(A and B)): 0.2
Probability of A given B (P(A|B)): 0.5; Probability of B given A (P(B|A)): 0.4
Dependent Events - Example 2
Probability of Event A (P(A)): 0.7; Probability of Event B (P(B)): 0.3; Probability of A and B (P(A and B)): 0.15
Probability of A given B (P(A|B)): 0.5; Probability of B given A (P(B|A)): 0.2142857143
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