Free interpolate between data points calculator to interpolate between data points. Instant results in your browser — no signup.
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Primary answer and useful breakdowns.
Interpolated y
20.0000
y = y₁ + (x − x₁)(y₂ − y₁)/(x₂ − x₁)
Free interpolate between data points calculator to interpolate between data points. Instant results in your browser — no signup. Linear interpolation assumes constant slope between two points.
Linear interpolation assumes constant slope between two points.
(0,0) to (10,50) at x=4 → y=20.
Works outside [x₁,x₂] but assumes the same slope — use cautiously.