Thermal Expansion Calculator
Calculate how much a material expands or contracts due to temperature change using linear or volumetric expansion formulas.
Use the Thermal Expansion Calculator
Inputs
× 1 /°C
Select a preset or enter a value (e.g. 11.7e-6 for steel).
Enter values and click Calculate to see results.
Results
Initial Length
—
Change (ΔL)
—
Final Length
—
Formula Breakdown
Change in Other Units
Summary
This tool computes the change in length or volume of a material when it is heated or cooled. It supports both linear thermal expansion (ΔL = α · L₀ · ΔT) and volumetric thermal expansion (ΔV = β · V₀ · ΔT). Simply enter the initial dimension, temperature change, and select a material or enter a custom coefficient.
How it works
- Choose between Linear (length) or Volumetric (volume) expansion mode.
- Enter the initial length or volume with the appropriate unit.
- Enter the temperature change (positive = heating, negative = cooling).
- Select a preset material or enter a custom expansion coefficient.
- Click Calculate to see the expanded/contracted dimension and the change amount.
Use cases
- Estimate gap allowances for steel rails, bridges, and pipelines.
- Determine thermal stress in mechanical assemblies and joints.
- Check expansion of plastic or rubber components in hot environments.
- Verify liquid overflow when heating fluids in closed containers.
- Classroom and lab calculations for physics and materials science.
- Validate engineering tolerances for precision parts across temperature ranges.
Frequently Asked Questions
Last updated: 2026-09-30 ·
Reviewed by Nham Vu