Linear regression and correlation calculator Linear regression and correlation calculator

Linear regression and correlation calculator

Paste paired observations, inspect a scatter plot and fitted line, predict Y and export residuals. Aggregate-sum mode remains available without an invented chart.

Ordinary least squares for Y against X with an intercept. Example observations are editable. Calculations stay in your browser; no observation data is sent to the server.

Correlation is not causation. This tool does not calculate confidence intervals or significance tests. RMSE uses the number of observations, not residual degrees of freedom. Constant Y has no defined r or R².

Quick start

Paste paired observations, inspect a scatter plot and fitted line, predict Y and export residuals. Aggregate-sum mode remains available without an invented chart.

  1. Replace the example with your values and check units.
  2. Select Calculate and review the result below.
  3. Save CSV, JSON or a printable report from the last calculation.

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