Statistics & Probability
Instant, private, and free
Birthday Paradox Calculator.
Calculate birthday paradox from explicit inputs using the documented formula.
On-device calculationNo signup
01
Set your values
Results update as you type.
02 / ANSWER
collisionProbability: 0.507297
noCollisionProbability: 0.492703
Results update automatically as you type.
FAQs
What does this calculator assume?
Calculate birthday paradox from explicit inputs using the documented formula. No unstated input convention is inferred.