Perimeter of the circle is the enclosing boundary of the circle . The area of the circle is the space in a two-dimensional plane covered by a circle . Learn how to calculate the circumference of a circle using different formulas and a calculator. Find the radius, diameter, area and circumference of a circle given any one value. 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… How to Find the Perimeter of a Circle The perimeter of a circle is called the circumference . The formula for perimeter of a circle is the circumference formula. It is given as: C = 2πr or: C = πd Where C is the circumference , r is the radius of the circle , and d is the diameter of the circle . Here is an example of using this formula to find circumference of a circle with a radius of 3: C = 2π (3) = 6π, circumference = 6π.
