Poisson distribution calculator
PMF and CDF for Poisson(λ).
Calculator
How to use
Count data
λ mean rate.
Educational use only. For assessments, show reasoning and check boundary cases.
PMF and CDF for Poisson(λ).
λ mean rate.
Educational use only. For assessments, show reasoning and check boundary cases.
Model / formula
Poisson(λ)
Result
P(X=2) = 0.224042 | P(X≤2) = 0.423190