Circular millimetre

A circular millimetre is a unit of area, equal to the area of a circle with a diameter of one millimetre. It has been used mainly for wire sizes. Symbol of the unit is cmm.[1]

Conversion

1 circular inch ≡ 645.16 Circular millimetre[1]

References

  1. 1 2 Cardarelli, François Cradarelli (2003). Encyclopaedia of Scientific Units, Weights and Measures. London: Springer. p. 33. ISBN 978-1-4471-1122-1.
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