# Thermal Expansion Formula

Thermal expansion is caused when the temperature of a body is increased. This gives out a change in dimension either in length, volume or area. There are three types of thermal expansions. They are Linear expansion, Area expansion, and Volume expansion. Below given are thermal expansion formulas for these expansions. These three thermal expansion equations depend on their original value, change value and a factor called as expansion coefficient.

# Thermal Expansion Equation

#### Linear Expansion Formula

ΔL/L_{О} = α_{L}ΔT

#### Volume Expansion Formula

ΔV/V_{О} = α_{V}ΔT

#### Area Expansion Formula

ΔA/A_{О} = α_{A}ΔT

**Where,**

ΔT = Temperature difference

L_{О} = Original length

ΔL = Change in length

V_{О} = Original volume

ΔV = Change in volume after expansion

ΔA = Change in area

A_{О} = Expanded area

α = Expansion coefficient

The explanation for all these expansions are as follows.

Linear Expansion : It is caused when there is a change in length.

Area Expansion : It is caused when there is any change in area due to temperature.

Volume Expansion : It is caused when there is any change in volume due to temperature.