Convert Circular Mils to Square Kilometers
Convert Circular Mils (cmil) to Square Kilometers (km²) instantly and accurately.
Conversion Formula
km² = cmil × 5.067074791e-16
About Circular Mils
A circular mil (cmil) is a unit used in electrical engineering to specify the cross-sectional area of round wires and cables. Equal to the area of a circle with a diameter of exactly one thou (one thousandth of an inch) - approximately 5.067 × 10⁻¹⁰ m² - it simplifies wire calculations: the cross-sectional area in cmil equals the wire diameter in mils, squared. US electrical codes (NEC/NEMA) specify conductor sizes in circular mils, and large cables are rated in thousands of circular mils (kcmil or MCM). A 12 AWG wire, common in US household wiring, has a cross-section of 6,530 cmil.
About Square Kilometers
A square kilometer (km²) is a metric unit of area equal to a square with sides of one kilometer (1,000 m × 1,000 m). It is used for measuring large land areas such as cities, forests, lakes, and countries. Manhattan (New York) is about 59 km², and Monaco (the second smallest country) is just over 2 km². This unit is essential in geography, urban planning, forestry, and environmental impact studies.
Quick Reference Table
| Circular Mils (cmil) | Square Kilometers (km²) |
|---|---|
| 1 cmil | 5.067 × 10-16 km² |
| 2 cmil | 1.013 × 10-15 km² |
| 5 cmil | 2.534 × 10-15 km² |
| 10 cmil | 5.067 × 10-15 km² |
| 25 cmil | 1.267 × 10-14 km² |
| 50 cmil | 2.534 × 10-14 km² |
| 100 cmil | 5.067 × 10-14 km² |