Linear Interpolation
Estimate a value between two known coordinate pairs.
Your numbers
Interpolated y
Values outside the two input x coordinates are linear extrapolations, not measured observations.
Scenario comparison
Up to three snapshots in this tab. Loading one replaces the current inputs.
Formula
y=y₁+(x−x₁)(y₂−y₁)/(x₂−x₁)
Estimate a value between two known coordinate pairs.
Worked example
- First x
- 0
- First y
- 10
- Second x
- 100
- Second y
- 30
- Target x
- 50
- Interpolated y
- 20
Scope and limitations
Values outside the two input x coordinates are linear extrapolations, not measured observations.
Inputs are checked for missing values and allowed ranges. A result outside the finite numeric range is not displayed. Rounding affects display, while the calculation uses the model’s numeric precision.
Check your units and assumptions before relying on a result. Changing a label does not convert a currency or physical unit.
Formula version: a15bb1aa9757 · Example checked: