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As a unit of area, the circular mil can be converted to other units such as square inches or square millimetres. 1 circular mil is approximately equal to: 0.7854 square mils (1 square mil is about 1.273 circular mils) 7.854 × 10 −7 square inches (1 square inch is about 1.273 million circular mils) 5.067 × 10 −10 square metres
1 square mil is equal to: 1 millionth of a square inch (1 square inch is equal to 1 million square mils) 6.4516 × 10 −10 square metres; about 1.273 circular mils (1 circular mil is equal to about 0.7854 square mils). 1.273 ≈ 4 / π and 0.7854 ≈ π / 4 .
Thousandth of an inch, an inch-based unit often called a thou or a mil. Circular mil, a unit of area, equal to the area of a circle with a diameter of one thousandth of an inch. Square mil, a unit of area, equal to the area of a square with sides of length of one thousandth of an inch.
Following one of its recommendations, it differs from pre-existing gauges scarcely more than they differ among themselves, and is based on a rational system, the basis being the circular mil. No. 7/0, the largest size, is 0.50 inches (500 mils or 12.7 mm) in diameter (250 000 circular mils in cross-sectional area), and the smallest, No. 50, is ...
The next wire size thicker than 4/0 has a cross section of 250 kcmil. A circular mil is the area of a wire one mil in diameter. One million circular mils is the area of a circle with 1,000 mil (1 inch) diameter. An older abbreviation for one thousand circular mils is MCM.
circular inch: circ in ≡ π ⁄ 4 sq in ≈ 5.067 075 × 10 −4 m 2: circular mil; circular thou: circ mil ≡ π ⁄ 4 mil 2: ≈ 5.067 075 × 10 −10 m 2: cord: ≡ 192 bd ≡ 1.486 448 64 m 2: cuerda (PR Survey) cda ≡ 1 cda x 1 cda = 0.971 222 acre ≡ 3 930.395 625 m 2: dunam: ≡ 1000 m 2: ≡ 1000 m 2: guntha (India) ≡ 121 sq yd ...
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This formulas can't possibly be right in its current form: "circular mil = square inches × π ÷ 4,000,000". Plugging in 0.7854 millionths of a square inch (as this is the value given in the next section "1 circular mil is approximately equal to: 0.7854 millionths of a square inch (1 square inch is about 1.273 million circular mils)") does not result in 1 cmil!