Diameter to Circumference Calculator

Circumference or perimeter of a circle is defined as the distance around it. The diameter of a circle is the straight line passing through the center of the circle. It is also called as the longest chord of the circle. This online diameter to circumference converter helps you to find the perimeter value from the given diameter at desired units.

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C = d x π Where, C = Circumference d = Diameter


A circle has a diameter of 10 m. What is its circumference / perimeter?
C = 10 x 3.14
C = 31.4 m.

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