Thermal Expansion Calculator
Length change with temperature.
Enter your values
ⓘ Live results
Results
- Length change
- 5.04 mm
- New length
- 12.00504 m
- Strain
- 4.200e-4
- Expansion gap advised
- 7.6 mm
Quick answer
Linear expansion equals the coefficient times original length times temperature change.
ΔL = α × L × ΔT
How to use the Thermal Expansion Calculator
- 1Enter the original length.
- 2Pick the material.
- 3Enter the temperature swing it will experience.
Worked example
Using the values the calculator loads with:
Inputs
- Original length12 m
- MaterialSteel
- Temperature change35 °C
Results
- Length change5.04 mm
- New length12.00504 m
- Strain4.200e-4
- Expansion gap advised7.6 mm
Frequently asked questions
Why leave an expansion gap?
Restrained expansion generates huge forces and cracks structures.
Does it work for cooling?
Yes — enter a negative temperature change.
About this calculator
- Built and reviewed by James Whitfield · How we build and test calculators
- Report an error
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.