Fisher’s Exact Test Calculator

Added 2026-08-29

Run a two-sided Fisher’s exact test for a 2×2 table with odds ratio and an approximate 95% odds-ratio interval.

✓ Runs locally in your browser✓ No account or dataset upload required✓ Effect sizes / uncertainty shown where appropriate

Two-sided exact p

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Odds ratio

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Approx. OR 95% CI

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Statistical output is a calculation aid. Check assumptions, study design and reporting requirements before drawing scientific conclusions.

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About this tool

Run a two-sided Fisher’s exact test for a 2×2 table with odds ratio and an approximate 95% odds-ratio interval.

Common uses

fishers exact test calculatorfisher exact test calculator2x2 fisher exact testodds ratio fisher exact

How it works

1Enter or paste the requested sample values, summary inputs or contingency data.
2Choose the method, confidence level or test options when available, then run the calculation.
3Review the estimate/test statistic together with p-value, confidence interval, effect size and method notes where available.

Frequently asked questions

Does this statistics calculation upload my data?

No. Entered values are processed locally in your browser with JavaScript.

Should I interpret statistical significance by itself?

No. Review effect size, confidence intervals, study design, assumptions, sampling and multiplicity together with the p-value.

Is the odds-ratio confidence interval exact?

The Fisher p-value is exact for the fixed-margin 2×2 table. The displayed odds-ratio interval is a log-scale approximation with a 0.5 correction when a cell is zero.

Fisher’s Exact Test Calculator

How it works

Frequently asked questions

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