How does the Kruskal Wallis Calculator work?

Non-parametric alternative to ANOVA Then: H = (12 / (n(n+1))) × Σ(Ri²/ni) - 3(n+1) Then: Ri = sum of ranks for group i Then: Test statistic ≈ χ² with k-1 degrees of freedom.

Can you give an example of how to use the Kruskal Wallis Calculator?

Example: Input k=3 groups gives a result of H statistic.

Is the Kruskal Wallis Calculator free to use?

Yes — completely free with no registration, download, or subscription required. All calculations happen instantly in your browser.

How accurate is the Kruskal Wallis Calculator?

Our Kruskal Wallis Calculator uses verified mathematical formulas and is accurate to multiple decimal places. Results are calculated in real-time using the same methods used by professionals.

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Kruskal Wallis Calculator

Kruskal-Wallis Test

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Group 2

Group 3

Applies Kruskal-Wallis test comparing 3+ groups without normal distribution assumption.

Symbol	Name	Unit	Description
H	(12 / (n(n+1))) × Σ(Ri²/ni) - 3(n+1)	—	(12 / (n(n+1))) × Σ(Ri²/ni) - 3(n+1)

Difficulty:advanced

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Did You Know?

Kruskal-Wallis robust to outliers and non-normality; trades power for robustness.

References

›Kruskal-Wallis Test

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Kruskal Wallis Calculator

Kruskal-Wallis Test

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Kruskal-Wallis Test