Poisson Distribution PDF Calculator

Poisson Distribution PDF Calculator

For a Poisson distribution with rate parameter \(\lambda > 0\), the probability mass function is given by: $$ P(X=x)= \frac{\lambda^x\,e^{-\lambda}}{x!},\quad x=0,1,2,\dots $$

* Enter a nonnegative integer \(x\) and a rate \(\lambda\).

Step 1: Enter Parameters

e.g., 3

e.g., 2

Formula: $$ P(X=x)= \frac{\lambda^x\,e^{-\lambda}}{x!}. $$

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