Circle Radius Calculator

Calculate the radius of a circle from its area with ease.

Area (A):

Radius (r):

Visual Representation

Visualization is scaled for representation.

Understanding Circle Radius from Area

This tool helps you calculate the radius of a circle when you know its area. The area of a circle is the space enclosed within its circumference. The formula to calculate the area (A) of a circle using its radius (r) is:

$$ A = \pi r^2 $$

To find the radius when you know the area, we rearrange this formula to solve for r:

$$ r = \sqrt{\frac{A}{\pi}} $$

Here, $ \pi $ (pi) is a mathematical constant approximately equal to 3.14159. This calculator simplifies this process, allowing you to quickly find the radius by just entering the area. It's useful in various applications, from geometry problems to practical design and construction tasks.

How to Use:

Enter the area of the circle in the input field.
Click the "Calculate Radius" button.
The calculated radius will be displayed, and a visual representation of the circle will appear.
Use the "Copy" button to copy the radius value for your use.
Click "Reset" to clear the values and start a new calculation.