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Interpolate between data points

Linear interpolation between two known (x, y) points.

Also known as: interpolate between data points calculator, interpolation calculator, interpolate between data points, statistics math, statistics interpolate between data points

Inputs

Results update when you click Calculate.

Interpolated y

20.0000

y = y₁ + (x − x₁)(y₂ − y₁)/(x₂ − x₁)

  • Parameter t0.4000
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What this result means

Linear interpolation between two known (x, y) points. Linear interpolation assumes constant slope between two points.

Assumptions

  • Rule dependency: Universal formula.

How is it calculated?

Linear interpolation assumes constant slope between two points.

Example

(0,0) to (10,50) at x=4 → y=20.

Frequently asked questions

Extrapolation?+

Works outside [x₁,x₂] but assumes the same slope — use cautiously.