Circumference to Diameter Calculator

This is common when you can wrap a tape measure around an object (tree trunk, pipe, column, barrel) but cannot measure across it directly. Dividing the circumference by pi gives the diameter.

Yes. The calculator supports any positive decimal value, which is important for precise engineering and scientific measurements.

A circumference of zero means the circle has no size, resulting in a diameter of zero. In practice, ensure you enter a positive measurement.

First divide the circumference by pi to get the diameter, then divide the diameter by 2 to get the radius. The formula is r = C / (2 x pi).

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