# Area Thermal Expansion

Written by Jerry Ratzlaff on . Posted in Thermodynamics

Area thermal expansion, abbreviated as $$\Delta A$$, also known as aerial thermal expansion, happens when any change in temperature expands the area.

## Area Thermal Expansion Formulas

 $$\large{ \Delta A = A_f - A_i }$$ $$\large{ \Delta A = 2 \; \overrightarrow{\alpha_l} \; A_i \; \Delta T }$$

### Where:

 Units English Metric $$\large{ \Delta A }$$ = area thermal expansion $$\large{in^2}$$ $$\large{mm^2}$$ $$\large{ A_f }$$ = final area of object $$\large{in^2}$$ $$\large{mm^2}$$ $$\large{ A_i }$$ = initial area of object $$\large{in^2}$$ $$\large{mm^2}$$ $$\large{ \overrightarrow{\alpha_l} }$$   (Greek symbol alpha) = linear thermal expansion coefficient $$\large{ \frac{in}{in\;F} }$$ $$\large{ \frac{mm}{mm\;C} }$$ $$\large{ \Delta T }$$ = temperature differential $$\large{F}$$ $$\large{C}$$