The F Distribution Calculator finds the p-value for the given value of the F statistic and vice versa.

If you want to find the p-value, then enter the desired degree of freedom and value of the F statistic. Then click on Calculate p-value to find the answer.

Conversely, if you want to find the F-value associated with a cumulative probability then only input values in the first two boxes and the last box. Then click on Calculate F value.

It is important to find the p-value when conducting the ANOVA test or the F test for equality of variance. If the p-value is less than 0.05 we reject the null hypothesis otherwise, we accept the null hypothesis.