Free · Extend a straight trend

Linear Regression Value Predictor

Fit paired values, then use the line to estimate y at a chosen x.

Real linearRegressionLine calculation
Private in your browser
Text, CSV, and JSON

Try the calculation

This tool uses simple-statistics 7.10.0. Start with the example or enter your own numbers.

Your numbersCommas, spaces, and new lines all work

Number listSeparate numbers with commas, spaces, or new lines.Second number listUse the same number of entries when the values are paired.X value to predictThe line will estimate a matching y value.

The library runs in this tab. Your numbers are not uploaded or saved.

Result

Ready for your numbersChoose “Predict the value” to see the answer.

Three simple steps

How to use it

Use the example or enter your own numbers.
Set any option that appears below the number list.
Press “Predict the value,” then read or download the result.

Your numbers stay on this device

simple-statistics runs inside this browser tab. Bookify does not upload or save your list. The tool explains the calculation, but a number cannot judge data quality, study design, or what caused a pattern.