 # Circle Calculator

Diameter of Circle : unit

Area of Circle : unit square

Circumference of Circle : unit

Circle Calculator is a free online tool that displays the diameter, area and the circumference of the circle. BYJU’S online circle calculator tool makes the calculation faster, and it displays the area and the circumference in a fraction of seconds.

## How to Use the Circle Calculator?

The procedure to use the circle calculator is as follows:

Step 1: Enter the radius in the respective input field

Step 2: Now click the button “Calculate” to get the result

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

### What is Meant by Circle?

In Mathematics, the circle is defined as a two-dimensional closed figure where all points on the surface of the circle are equidistant from the centre point. The distance between the centre and the surface of the circle is called the radius. The diameter is the straight line that passes from one side of the circle to the other side through the center. The diameter is double the radius. The area and the circumference of the circle is given by the formula,

Area of the circle, A = πrSquare units

Circumference/perimeter of the circle= 2πr units