Circumference and diameter differ by a factor of approximately 3.141, or more precisely, pi. Circumference divided by pi will provide you with the diameter, while diameter multipled by pi will provide you with the circumference. In lieu of a calculator (if you don't have one) that has a pi-function, 3.14 is usually sufficient for an estimate.
Chat with our AI personalities
Diameter = Circumference/pi
Circumference is pi times diameter. Diameter is circumference divided by pi. Diameter is twice the radius. Radius is half the diameter.
Since the circumference is Pi times the diameter then divide the circumference by Pi (3.14159) to get the diameter
Circumference = diameter(pi) so divide the circumference by pi to get the diameter.
circumference = pi*diameter or pi = circumference/diameter