Cohen's Kappa Calculator

Calculate Cohen's kappa for inter-rater agreement from a two-by-two agreement table, with observed agreement and a strength label

Frequently Asked Questions

What does Cohen kappa measure?

Cohen kappa measures agreement between two raters on a categorical judgment while correcting for the agreement that would happen by chance.

Why not just use percent agreement?

Raw percent agreement can look high simply because one category is common. Kappa subtracts the chance baseline, giving a fairer measure of true agreement.

How do I interpret a kappa value?

Using the Landis and Koch scale, values from 0.4 to 0.6 are moderate, 0.6 to 0.8 are substantial, and above 0.8 are almost perfect agreement.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.