Coefficient of Determination (R²) Calculator
Calculate R-squared to measure how well a regression model fits the data
About R-Squared
The coefficient of determination (R²) measures the proportion of variance in the dependent variable that is predictable from the independent variable.
Formula: R² = 1 - (SS_residual / SS_total)
Interpretation:
- R² = 1: Perfect fit (100% variance explained)
- R² = 0: No linear relationship
- Adjusted R² accounts for the number of predictors
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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.