Eta Squared (η²) Calculator
Calculate effect size for ANOVA (proportion of variance explained)
About Eta Squared
Eta Squared (η²): SS_effect / SS_total - proportion of variance explained.
Omega Squared (ω²): Less biased estimate, preferred for population inferences.
Interpretation (Cohen, 1988):
- η² < 0.01: Negligible
- 0.01 ≤ η² < 0.06: Small
- 0.06 ≤ η² < 0.14: Medium
- η² ≥ 0.14: Large
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Editorial Note
MyCalcBuddy Editorial Team
This page is maintained as an educational calculator reference.
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Formula Source: Standard Mathematical References
by Various
🔄Last reviewed: May 2026
✓Formula checks are based on standard references and internal QA review.