Conditional Probability
Calculate P(A given B) from joint probability and the probability of B.
Your numbers
Conditional probability
Use consistent units. The result follows the assumptions you enter.
Scenario comparison
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Formula
P(A|B)=P(A∩B)/P(B)
Calculate P(A given B) from joint probability and the probability of B.
Worked example
- Joint probability P(A and B) (%)
- 20
- Probability P(B) (%)
- 40
- Conditional probability
- 50 %
Scope and limitations
Use consistent units. The result follows the assumptions you enter.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: 7bd0009a8204 · Example checked: