Calculate F critical values, determine statistical significance, visualize F-distribution curves, and explore complete F-table reference values for ANOVA and variance testing.
F-Distribution Table Calculator with Interactive Curve
Visual probability
df1 = 3 · df2 = 20F Distribution
Selected regionP(F >= 3.0984)
Probability0.0500
F
The F distribution is right-skewed and defined only for non-negative values.
Calculator
Find Critical F-Value and P-Value
Between-groups degrees of freedom
Within-groups degrees of freedom
Used to calculate the p-value
Calculated answer
Results
i
What this result means
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What Is an F-Statistic?
An F-statistic compares two variance estimates. In ANOVA, the ratio compares between-group variation with within-group variation.
F = MS between / MS within
- df1 = numerator degrees of freedom
- df2 = denominator degrees of freedom
- F values are non-negative
Common Critical F-Values
Upper-tail critical values at alpha = 0.05.
| df1 | df2 | Critical F |
|---|
F-distribution reference table
Critical Values of the F Distribution
Rows represent denominator degrees of freedom, while columns represent numerator degrees of freedom.
Upper-tail critical values for alpha = 0.05.
Values are calculated dynamically and rounded to three decimal places.
Published: August 29, 2026
Last Updated: August 29, 2026
