About this tool
Combine the probabilities of two independent events and convert probability to odds.
For independent events: P(A and B) = P(A)·P(B), P(A or B) = P(A) + P(B) − P(A)·P(B), P(not A) = 1 − P(A). Odds in favour = P ÷ (1 − P).
Formula: P(A∩B) = P(A)P(B) · P(A∪B) = P(A) + P(B) − P(A)P(B)
Example: Probability of A = 50, Probability of B = 30 → A and B = 15%, A or B = 65%.
The formulas assume the two events do not influence each other.
Quick steps
- Enter your values — every field shows its unit.
- Press Calculate (or Try an example to see how it works).
- Read the results and copy them if you need them elsewhere.
The calculation runs in your browser. Nothing you type is sent to 1CLIK.
FAQ
How does the Probability & Odds Calculator work?
For independent events: P(A and B) = P(A)·P(B), P(A or B) = P(A) + P(B) − P(A)·P(B), P(not A) = 1 − P(A). Odds in favour = P ÷ (1 − P).
What should I keep in mind?
The formulas assume the two events do not influence each other.
Is my data sent anywhere?
No. The numbers stay on your device; the page only shows the result.