Binomial Distribution Calculator
StatisticsCalculates the probability of observing a specific number of successes in a fixed number of independent Bernoulli trials, given the probability of success on each trial.
How to use this calculator
Start with your values, or try a preset.
Enter Number of Trials (n), Probability of Success (p), and Number of Successes (k) in the units shown.
Read Combinations (n choose k) and Probability (P(X = k)) in the results panel. Results update as you change the inputs.
Choose a preset to load an example, then adjust the values for your situation.
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