Bonferroni correction calculator
Paste p values from one test family and enter the family-wise alpha level.
Corrected tests
| Test | p | Adjusted p | Threshold | Rejected |
|---|---|---|---|---|
| Fill in the fields above — the result is computed on this page. | ||||
How to use this page
- Paste all p values.
- Enter family-wise alpha.
- Read the threshold, adjusted p values and decisions.
What this page does not do: Bonferroni is conservative, especially with many dependent tests. If the goal is to control the false-discovery proportion, consider an FDR procedure.
Further reading
Bonferroni divides the family-wise alpha by the number of tests. Equivalently, multiply each p value by the test count and cap the result at one.
The method controls the probability of at least one type I error in the family, but can have low power when many comparisons are made.
Frequently asked questions
Does p-value order matter?
No. Every p value is multiplied by the same number of tests.
When should I use FDR instead?
When a controlled false-discovery proportion is acceptable and higher power matters.
See also
ACF and PACF autocorrelation calculator
Calculate ACF and PACF across time-series lags. Review the chart, reference bounds and coefficient table.
Adjusted R-squared calculator
Convert R² to adjusted R² using the number of observations and predictors in a regression model.
Beta distribution calculator
Calculate beta density, CDF, upper tail and quantile together with its mean and variance.