 # Equation of A Circle Calculator

Equation of a Circle Calculator is a free online tool that displays the equation of a circle of a given input. BYJU’S online equation of a circle calculator tool makes the calculation faster, and it displays the equation in a fraction of seconds.

## How to Use the Equation of a Circle Calculator?

The procedure to use the equation of a circle calculator is as follows:
Step 1: Enter the circle centre and radius in the respective input field
Step 2: Now click the button “Find Equation of Circle” to get the equation
Step 3: Finally, the equation of a circle of a given input will be displayed in the new window

### What is the Equation of a Circle?

In geometry, a circle is a two-dimensional round shaped figure where all the points on the surface of the circle are equidistant from the centre point (c). The distance from the centre of the circle to the surface is called the radius (R). The equation of a circle can be calculated if the centre and the radius are known. Thus the equation of a circle is given by
(x-h)2 +(y-k)2 = r2
Where
(h, k) – centre coordinates
r – radius