Square mil
A square mil is a unit of area, equal to the area of a square with sides of length one mil. A mil is one thousandth of an international inch. This unit of area is usually used in specifying the area of the cross section of a wire or cable.
Equivalence to other units of area
1 square mil is equal to:- 1 millionth of a square inch
- about 1.273 circular mils. and