Use this linear regression calculator to analyze the relationship between two variables using simple linear, quadratic, or cubic models. It finds and graphs the best-fit line, displays the regression equation, and provides key model statistics. Enter your paired data in the spreadsheet-style table—either manually or by pasting multiple cells from a spreadsheet. Ensure that the first column contains the dependent variable (Y) and the second column is the independent variable (X). The table can handle up to 300 rows and will expand automatically when you paste in the data. Choose your regression model and click Analyze to generate the results. If you include the variable names in the header, they will appear in the results.
The linear regression calculator output includes the regression equation, a model summary, an analysis of variance (ANOVA) table, and a scatterplot with the fitted regression line. You’ll see values for R-squared, adjusted R-squared, and the F-statistic, helping you assess how well the model explains the variability in your data. This linear regression calculator is ideal for quickly visualizing trends and evaluating model fit. Below the calculator, you’ll find additional guidance and explanation. See all my Statistical Calculators!