The Poisson Calculator makes it easy to compute individual and cumulative Poisson probabilities. For help in using the calculator, read the Frequently-Asked Questions or review the Sample …

This Poisson distribution calculator can help you find the probability of a specific number of events taking place in a fixed time interval and/or space if these events take place with a known …

This Poisson distribution calculator finds the probability of a specific number of events occurring within a fixed interval of time or space, based on a known average rate. Just enter the average …

The Poisson Distribution Calculator computes probabilities based on user inputs for λ (average rate, non-negative) and k (number of events, non-negative integer).

Read on to find out what kinds of events are suitable for analysis using this calculator, the Poisson distribution formula, and the Poisson distribution properties.

Poisson Distribution $X \sim Pois (\lambda)$ ... Help ©2025 Matt Bognar Department of Statistics and Actuarial Science University of Iowa

3 days ago · Poisson Probability Calculator You want to calculate the probability (Poisson Probability) of a given number of occurrences of an event (e.g. customers entering the shop, …

Enter the average rate of success and the number of occurrences in the calculator below to find the probabilities of an event occurring using the Poisson distribution.

The free online Poisson distribution calculator computes the Poisson and cumulative probabilities for a given mean and random variable. A statistical summary along with graphical …

Calculate probabilities for events occurring randomly over a fixed interval using the Poisson distribution.