Kruskal-Wallis Test Calculator

Perform a Kruskal-Wallis H test to compare rank distributions across multiple independent groups.

Total Observations (N)

Number of Groups (k)

Group 1 Size (n₁)

Group 1 Rank Sum (R₁)

Group 2 Size (n₂)

Group 2 Rank Sum (R₂)

Group 3 Size (n₃)

Group 3 Rank Sum (R₃)

Tab to move between fields

H Statistic

2.52

P-Value (approx)

0.28

Degrees of Freedom2

Significant at α=0.05 (1=Yes)0

Effect Size (η²H)0.02

How to Use This Calculator

Enter Total Observations (N), Number of Groups (k), and Group 1 Size (n₁).
Set Group 1 Rank Sum (R₁), Group 2 Size (n₂), and Group 2 Rank Sum (R₂).
Adjust Group 3 Size (n₃), Group 3 Rank Sum (R₃) as needed.
Review H Statistic and P-Value (approx).
Use Degrees of Freedom and Significant at α=0.05 (1=Yes) to inform your decision.

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