A circular mil is a unit of area, equal to the area of a circle with a diameter of one mil. A mil is one thousandth of an inch. A circular mil is a convenient unit for referring to the area of the cross section of a wire or cable with a circular cross section, as the area can be calculated without reference to pi. The definition, agreement and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day. ... Area is a physical quantity expressing the size of a part of a surface. ... In Euclidean geometry, a circle is the set of all points in a plane at a fixed distance, called the radius, from a fixed point, the centre. ... Diameter is an AAA (authentication, authorization and accounting) protocol for applications such as network access or IP mobility. ... A thou, also known as a mil, is a unit of length equal to one thousandth of an international inch. ...
The area in circular mils, A, of a circle with a diameter of d mils, is given by: A = d2
Equivalence to other units of area
1 circular mil is equal to:
about 0.7854 millionths of a square inch (1 square inch is equal to about 1.273 million circular mils)
about 0.7854 square mils (1 square mil is equal to about 1.273 circular mils)
Mid-19th century tool for converting between different standards of the inch An inch is an Imperial and U.S. customary unit of length. ... metre or meter, see meter (disambiguation) A metre or meter[1] (symbol: m) is a unit of length and the current base unit of length in the International System of Units (SI). ...
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