Linear Regression Calculator

Least Squares Regression Line Calculator - estimates slope & intercept.
Enter observations in box, use a separate line or comma between each measurement.

TrendLine Equation


Graph to Show predicted value and degree of fit. Tap or Hover over the trendline in the graph below to get the predicted value of the series for a given value of X.

Tool Overview - Linear Regression Calculator

This linear regression calculator fits a linear trendline to your data using the least squares technique. It optimizes the fit of the trendline and returns the y-intercept and slope of the line. Then - to help you visualize the trend - we display a plot of the data and the trendline we fit through it. If you hover or tap on the chart (in most browsers), you can get a predicted Y value for that specific value of X. The calculator also evaluates how well the linear trendline fits the data via the R-squared statistic.

Enter your sample data as a string of numbers - separated by commas or with a new line for each measurement. The linear regression calculator will estimate the slope and intercept of a linear trendline that is the best fit with your data.

Some practical comments on using regression in real world analysis:

Sharing Results of The Linear Regression Calculator

Need to pass an answer to a friend? It's easy to link and share the results of this calculator. Hit calculate - then simply cut and paste the url after hitting calculate - it will retain the values you enter so you can share them via email or social media.

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