Circle Calculator

A circle is the set of all points in a plane at a fixed distance, called the radius, from a given point, the centre. Here you can calculate the area, diameter, circumference of a circle and also area of a sector.

Diameter of Circle: [ 2r ]

Area of Circle: [πr² ]

Circumference of Circle:[ 2πr ]

Area of Sector: [ ½×arc×(angle in degree) ]