Coefficient of Determination (R²) Calculator

Calculate R² coefficient of determination measuring proportion of variance explained by linear regression.

How It Works & Processing Standards

Enter values above to calculate results automatically. Check each input field for guidance and units.

Your input data is never sent to any server and is securely processed on your device.

Current Limits

  • Maximum input length: 100,000 characters

Coefficient of Determination (R²) Calculator is a 100% free, browser-based online utility. All calculations and file conversions run locally inside your browser (Local-First) without sending data to remote servers, keeping your documents and inputs strictly private.

How to Use Coefficient of Determination (R²) Calculator

  1. 1
    Enter Dataset XType independent variable values.
  2. 2
    Enter Dataset YType dependent variable values.
  3. 3
    View R²Inspect goodness-of-fit percentage.

Common Use Cases

  • Evaluating regression model predictive accuracy
  • Measuring how much stock price variance is explained by market index movement
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