## Example

=PI()*POWER(C3,2)

## Generic Formula

=PI()*POWER(Radius,2)

**Radius**– This is the radius of the circle which you want to calculate the area of.

## What It Does

This formula will calculate the area of a circle given its radius.

## How It Works

The area of a circle is given by Pi*Radius^2 where **Pi** is a constant approximately equal to **3.14159265**. Excel has this constant built in as a function with no parameter inputs PI().

The POWER function will take any number and raise it to the power of any other number. POWER(Radius,2) will return the square of the Radius. In our example, POWER(3,2) results in 9, and 3.14159265*9 = **28.27**.