It doesnt matter whether you want to find the area of a circle using diameter or radius - youll need to use this constant in almost every case. C 2 p r. Now that you know how to calculate the area of a circle we encourage you to try our other circle calculators.
It doesnt matter whether you want to find the area of a circle using diameter or radius - youll need to use this constant in almost every case.
Circumference of a Circle. Area of a circle formula. Area pr 2. We all know the area of a circle is pi times the radius squared.