Free ANOVA CalculatorOne-way and two-way ANOVA with multiple comparisons.

Paste one column per group for a one-way ANOVA: F, P, the ANOVA table and Tukey, Bonferroni or Dunnett comparisons with adjusted P values and confidence intervals.
Use the Grouped table for two-way ANOVA, or switch to Kruskal–Wallis for data that isn’t normal.

Multiple comparisonsSignificance bracketsNo upload

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THREE SIMPLE STEPS

How to use the ANOVA Calculator

Enter the groups

One column per group in the Column table (or rows × columns in the Grouped table for two factors).

Pick comparisons

Tukey for all pairs, Dunnett for each group against a control, or Bonferroni.

Graph it

Bars, dots, box or violin plots with error bars and stars over the significant pairs.

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