Circumference Calculator is a free online tool that displays the circumference of the circle. CoolGyan’S online circumference calculator tool makes the calculation faster, and it displays the circumference value in a fraction of seconds.

## How to Use the Circumference Calculator?

The procedure to use the circumference calculator is as follows:

**Step 1:** Enter the radius in the respective input field

**Step 2:** Now click the button “Solve” to get the circumference

**Step 3:** Finally, the circumference of the circle will be displayed in the output field

### What is Meant by the Circumference?

In mathematics, the circumference is defined as the enclosing region of any curved geometric figure, specially defined for the shape circle. In other words, the circumference is the length of the circle. For any other shapes, the term perimeter is defined. When the boundary of the circle is opened up, it will be straightened out to the line segment. The formula to calculate the circumference of a circle is given by:

Circumference of a circle, C = 2πr units

Where

“r” is the radius of the circle.