Binomial Test Calculator

Test if an observed proportion differs significantly from an expected proportion

Number of Successes:

Number of Trials:

Expected Proportion (null hypothesis):

Test Type:

The binomial test is an exact test for the proportion of successes in a binary outcome.

It's used to test whether the observed success rate differs from an expected probability.

Unlike approximate tests, it gives exact p-values based on the binomial distribution.

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This page is maintained as an educational calculator reference.

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Formula Source: Standard Mathematical References

by Various

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.