Use our area of a circle calculator to find the area of a circle without having to remember any complicated formulas. For this calculator all you will need is the radius of the circle.

The radius of a circle can be defined as half of the diameter or the distance from the center of the circle to the outside edge. The formula used to find the area of a square is (pi)radius^2. Pi is generally represented by 3.14 although our formula is a little more exact. If you are like most of us and have a hard time multiplying anything by itself and then by pi, then let our area of a circle calculator take care of the complicated calculations for you. This calculator can be a great tool for your geometry homework, but we highly recommend that you learn the formulas and how they work so you can have a working knowledge of them for an exam.