Circle Area Calculator

Circle Area Formula:

Circle Area Definition

The Circle Area Calculator will instantly calculate the area of a circle if you simply enter in the circle’s radius. The radius of a circle is the distance from the middle of the circle to its outer edge in a straight line. The radius is equal to one half of a circle’s diameter (the diameter of a circle is the distance from one edge of a circle to the opposite edge in a straight line). This means that if you know either the diameter of a circle or the radius of a circle then you can just divide the diameter in half to get the radius or multiply the radius times two to get the diameter. Enter in the radius of the circle above to calculate the area of the circle.

How to Calculate Circle Area

Let's be honest - sometimes the best circle area calculator is the one that is easy to use and doesn't require us to even know what the circle area formula is in the first place! But if you want to know the exact formula for calculating circle area then please check out the "Formula" box above.

Add a Free Circle Area Calculator Widget to Your Site!

You can get a free online circle area calculator for your website and you don't even have to download the circle area calculator - you can just copy and paste! The circle area calculator exactly as you see it above is 100% free for you to use. If you want to customize the colors, size, and more to better fit your site, then pricing starts at just $29.99 for a one time purchase. Click the "Customize" button above to learn more!