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Linear Thermal Expansion from Coefficient and ΔT Calculator

Change in length of a material when heated or cooled.

Calculates the change in length due to thermal expansion: ΔL = α · L₀ · ΔT, where α is the linear expansion coefficient, L₀ is the original length, and ΔT is the temperature change.

Marcus Laurent By Marcus Laurent
Published Last reviewed 1 min read

Inputs

1/°C
m
°C

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ΔL = α · L₀ · ΔT

In depth

Calculates the change in length due to thermal expansion: ΔL = α · L₀ · ΔT, where α is the linear expansion coefficient, L₀ is the original length, and ΔT is the temperature change.