We can calculate the perimeter of a circle , also known as the circumference, by multiplying the length of its diameter by the constant pi. Therefore, we have the following formula: Here, d is the length of the diameter and π is a mathematical constant with a value of approximately 3.141592… Use this free circumference calculator to find the area, circumference and diameter of a circle . The circumference of a circle is the distance around the boundary of the circle . It is the same as calculating the perimeter of any polygon such as triangle, square, and rectangle. Mathematical formula of the perimeter of a circle . How to calculate the perimeter of a circle and example of a calculation.
