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Value Extrapolation Calculator

Linear Trend Extrapolation

First Data Point

X₁ Value

Y₁ Value

Second Data Point

X₂ Value

Y₂ Value

Extrapolation Point

X Value (extrapolate to)

Enter X value beyond the data range to extrapolate Y.

📚 Learn the Theory

Complete coverage of mathematical extrapolation methods, statistical validation, and accuracy limits.

Read Engineering Guide →

Formula

Y = Y₁ + (X - X₁) × (Y₂ - Y₁) / (X₂ - X₁)

Y = Extrapolated value

(X₁, Y₁), (X₂, Y₂) = Known data points

X = Value to extrapolate at

Common Applications

Performance Prediction
Equipment performance beyond tested ranges
Trend Analysis
Future values based on historical data
Property Estimation
Material properties at extreme conditions

Engineering Notes

<10% beyond range: Generally reliable (±5-10% error)
10-50% beyond range: Use with caution (±10-30% error)
>50% beyond range: High uncertainty, validate experimentally
Check physical limits (no negative pressures, temperatures > absolute zero)
Linear extrapolation assumes constant rate of change continues
For critical applications, use physics-based models or obtain additional data