Circular Inch, Circular Mil (cmil)


Circular Inch, Circular Mil (cmil) :

Informal units of area. A circular inch is the area of a circle one inch [1] in diameter, and a circular mil is the area of a circle one mil [1] in diameter. A circle of diameter d has an area of pi d2/4, so the circular inch is equal to approximately 0.785 398 square inches or 5.067 07 square centimeters, and the circular mil is equal to approximately 0.785 398 square mils or 506.707 square micrometers

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