Linear Regression Calculator

A LITTLE CONTEXT

How to use linear regression calculator

1. Enter or edit the example values in the input panel.
2. Review the method below and choose the options that match your task.
3. Run the tool, check the result, and copy or download it. Reset restores the example; Clear removes your input and result.

Method & assumptions

Ordinary least squares: slope b = Σ(dx·dy)/Σ(dx²); intercept a = ȳ−b·x̄; fitted y = a+b·x.

Fit one explanatory variable with an intercept by unweighted least squares. The result is a line description, not a causal model or a forecast guarantee. A constant Y series is allowed.

Result units: Slope and intercept (units follow the input data)

Worked example

X observations

1, 2, 3

Y observations

2, 4, 6

{
  "slope": 2,
  "intercept": 0,
  "observations": 3
}