Enter the thermal expansion coefficient, length, and change in temperature into the calculator to determine the change in length from thermal expansion.

## Thermal Expansion Formula

The following formula describes the relationship of thermal expansion.

dL = a * L * dT

- Where dL is the change in length
- a is the coefficient of thermal expansion
- L is the original length
- dT is the change in temperature.

## Thermal Expansion Definition

Thermal expansion is defined as the total increase in length or a dimension due to an increase in the temperature of the material.

## Thermal Expansion Formula

How to calculate thermal expansion.

**First, determine the coefficient of thermal expansion.**This can be looked up on a table based on the material or calculated through an experiment.

**Next, measure the original length.**Determine the original length or dimension of the object.

**Next, measure the change in temperature.**Calculate or measure the change in temperature.

**Finally, calculate the change in length.**Using the formula for thermal expansion, calculate the change in length.

## FAQ

**What is thermal expansion?**

Thermal expansion is the change in length or another dimension of an object when it undergoes a change in temperature.

**What causes thermal expansion?**

Thermal expansion is caused by the increased outward force of particles when their temperature is increased. The extra movement of particles causes objects to change in size.