Binomial & Poisson Calculator
PMF, CDF, mean and variance for binomial and Poisson distributions.
0.246094
P(X = 5)
0.623047
P(X ≤ 5)
5
Mean
2.5
Variance
About this tool
Compute the probability of exactly k events (PMF), at most k events (CDF), plus mean and variance for either the binomial(n, p) or Poisson(λ) distribution.