Circle’s Circumference Circumference of the circle or perimeter of the circle is the measurement of the boundary of the circle. Whereas the area of circle defines the region occupied by it. If we open a circle and make a straight line out of it, then its length is the circumference . It is usually measured in units, such as cm or unit m. The circumference of the circle is the length of its boundary. Explore and learn to calculate the circumference of a circle, with concepts, definitions, formulas, solved examples, and practice problems. The circumference of a circle is equal to the length of its boundary, but the circle is a curved shape, its circumference can't be measured with a ruler. The correct way to find the perimeter of a circle is to calculate it using the formula C = 2π × r. The circumference to diameter calculator can help you solve the geometry problem of finding the diameter of a circle by inputting its circumference . This calculator works both ways, so you can also convert a diameter to a circumference . Keep reading to learn more about: The circumference to diameter formula. How to calculate circumference from the diameter. How to get diameter from the circumference .
