Use this binomial distribution calculator to find the probability of a specific number of events occurring in a fixed number of trials. Just enter the probability of a single event (p), the number of trials (n), and the number of events you’re interested in (x). For example, the binomial distribution calculator can tell you the probability of getting 5 heads in 6 coin tosses.
The calculator displays several probabilities related to the number of events you enter. It also shows a binomial distribution graph with probabilities for all possible numbers of events, highlighting your selected value in red. This graph helps you see how your chosen number of events (x) fits within the full range of outcomes for the number of trials (n). Below the binomial distribution calculator, you’ll find additional information and examples for using it. See all my Statistical Calculators!