## Area of a Circle Calculator

The area of a circle is calculated using the following formula: $$Area = \pi r^2$$ Where $$r$$ is the radius of the circle and $$\pi$$ is the mathematical constant pi. The radius of a circle is the distance from the center of the circle to any point on the perimiter.
The formula explained: take the square of the radius and multiply it by $$\pi$$. If you are not familiar with the $$\pi$$ (pi) symbol, please visit this page: What is Pi?
Enter the radius of a circle below to see its area.