Calculate the Circumference of a Circle

This will calculate the circumference of a circle based on its diameter.
ft
in
Circumference of a 3′6″ diameter circle
10.996feet
131.95inches
10′ 11.95″feet and inches
3.3515meters
335.15centimeters
(results may be rounded)

Circumference of a Circle Formula

The circumference of a circle is pi times its diameter.

Circumference = π * Diameter

Diameter of a Circle

The diameter of a circle is the distance from one edge to the other, passing through the center. It is twice the radius.

Diameter