Binomial Distribution Calculator
Find the probability of k successes in n trials.
How this calculator works
The binomial distribution gives the chance of exactly k successes in n independent trials, each with success probability p. The tool also gives the cumulative probabilities, the mean n x p and the standard deviation.
Frequently asked questions
When can I use a binomial distribution?
When there is a fixed number of independent trials with two outcomes and the same success chance each time.
What is P(X <= k)?
The probability of k or fewer successes.
What is the mean of a binomial?
It is n multiplied by p.
