Circle radius calculator

The size of any circle depends on one single parameter that guides it when it is drawn - this is the radius. The radius of a circle, by definition, is the distance from the center of the circle to each point on it. The radius of the circle is directly proportional to the circumference and diameter.

Circle — is a part of a plane lying inside a circle. In other words, this is the geometrical location of the points of the plane, the distance from which to a given point, called the center of the circle, does not exceed a given non-negative number. The number is called the radius of this circle. If the radius is zero, then the circle degenerates to a point.

Calculate circle radius with our circle radius calculator.