Linear Regression Calculator

Fit a simple linear model from raw paired data, quantify uncertainty, predict new values, inspect residuals and influence, and export a research-ready result — all locally in your browser.

InferenceSlope test, ANOVA, confidence intervals.

PredictionMean CI and individual prediction interval.

DiagnosticsResiduals, leverage and Cook’s distance.

PrivateNo uploads, accounts or external libraries.

Paste paired X and Y data

One pair per line. Comma, tab, semicolon or spaces are accepted.

Raw observations

Exactly two numeric values are used per valid row. Invalid or incomplete rows are reported instead of silently accepted.

Inference & prediction settings

Confidence level (%)

Predict Y when X =