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Circumference of a circle (perimeter of a circle) formula calculator

Circumferenc of a circle (perimeter of a circle) formula calculator allows you to find a circumference (perimeter) of a circle, by the formula, using radius of a circle.
Radius (r):

Circumference of a circle

A circle is the set of all points in a plane that are at a given distance from a given point, the centre.
Formula for circumference of a circle: p = 2πr,
where r - radius of a circle, π = 3.14159