Regression Prediction Calculator

Enter the intercept, slope and x to predict y.

How to use

  1. Enter your values in the fields above.
  2. Press Calculate to see your result instantly.
  3. Use the Share button to copy a link to your result.

About this calculator

Once a simple linear regression has been fitted to a dataset, giving an intercept a and slope b, the fitted line y = a + b·x can be used to predict the expected response for any new value of x — this calculator performs that final prediction step given the fitted parameters and a chosen x.

Analysts, students and researchers across economics, biology, engineering and business use this kind of point prediction after regression analysis to forecast an outcome (sales, a lab measurement, a test score) from a single predictor, though it's most reliable for x-values inside the range the model was actually fitted on, since extrapolating far beyond the data risks error.

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