Thermal Expansion Calculator
How much does a length change with temperature? Enter the stated inputs to calculate this model.
Result for the values shown.
Calculations run in your browser.
What to enter
| Input | Meaning and units |
|---|---|
| Initial length (m) | Enter initial length in m; use the same basis as the other measurements. |
| Linear expansion coefficient (1/K) | Enter linear expansion coefficient in 1/K; use the same basis as the other measurements. |
| Temperature change (K) | Enter temperature change in K; use the same basis as the other measurements. |
Understanding your result
Read Length change (m), Final length (m) in the units and model stated on this page. The formula change=alpha*length*delta · final=length+change defines the relationship; measurement accuracy and model applicability are separate from numerical precision.
Common mistakes
- Mixing input units or changing the physical meaning of a variable without changing the model.
Check your calculation
- Use the worked example as a known reference case, then change one input at a time and check the direction and units of the response.
Calculation checks, sources and review limits
How much does a length change with temperature?
How much does a length change with temperature? Enter the stated inputs to calculate this model.
Common uses
- How much does a length change with temperature
How it works
change=alpha*length*delta; final=length+change
Worked example
Enter Initial length: 2 m; Linear expansion coefficient: 0.00001 1/K; Temperature change: 100 K. Results: Length change: 0.002 m; Final length: 2.002 m.