# Circular mil conversions

area conversions » circular mil conversionsThe circular mil conversion selector on this page selects the area/surface measurement unit to convert to starting from circular mils (cmil). To make a conversion starting from a unit of area other than circular mil, simply click on the "Reset" button.

## What is circular mil?

The **circular mil** is a unit of area in the Imperial and US customary systems of units equal to 5.067x10-10 square meters (1 circular mil = 5.067x10-10 m2), the standard derived unit of area in the International System of Units (SI). It is also equal to 5.067x10-6 square centimeters (cm2), or 0.0005067 square millimeters (mm2), or 506.7 square micrometers (μm2) or 506.7x106 square nanometers (nm2) (units of area in the SI), or about 0.7853 square mils (sq mil), or 7.853x10-7 square inches (sq in) or 5.454x10-9 square feet (sq ft), which are Imperial / US customary units of area.

The circular mil is an Imperial / US customary unit of area. The mil is a unit of length in the Imperial and US customary systems of units. An area of 1.0 circular mil is the area of a circle that is 1.0 mil in diameter.

The conversion formula between square mils and circular mils:

Square Mils = π/4 × Circular Mils

The circular mil is used to specify the area of the cross section of a cable or wire. For example, a wire size of 200 kcmil or 200 MCM is a wire that has a cross-section of 200,000 circular mils.

*Note:*

1 MCM = 1 kcmil = 1,000 circular mils

*Symbol:*

cmil

*Plural:*

circular mils

## Circular mil conversions: links

A detailed list with conversions from circular mils to other (metric, imperial, or customary) area and surface measurement units is presented below.

- circular mil to acre (cmil to ac)
- circular mil to acre (US survey) (cmil to ac)
- circular mil to are (cmil to a)
- circular mil to carreau
- circular mil to centiare (cmil to ca)
- circular mil to circular inch (cmil to circ in)
- circular mil to decare (cmil to daa)
- circular mil to dunam
- circular mil to hectare (cmil to ha)
- circular mil to mu
- circular mil to ping
- circular mil to pyong
- circular mil to rood (cmil to ro)
- circular mil to section
- circular mil to square centimeter (cmil to sq cm)
- circular mil to square chain (cmil to sq ch)
- circular mil to square decameter (cmil to sq dam)
- circular mil to square decimeter (cmil to sq dm)
- circular mil to square foot (cmil to sq ft)
- circular mil to square hectometer (cmil to sq hm)
- circular mil to square inch (cmil to sq in)
- circular mil to square kilometer (cmil to sq km)
- circular mil to square meter (cmil to sq m)
- circular mil to square micrometer (cmil to sq μm)
- circular mil to square mil (cmil to sq mil)
- circular mil to square mile (cmil to sq mi)
- circular mil to square millimeter (cmil to sq mm)
- circular mil to square nanometer (cmil to sq nm)
- circular mil to square yard (cmil to sq yd)
- circular mil to stremma