Convert Circular Mils to Square Decimeters
Convert Circular Mils (cmil) to Square Decimeters (dm²) instantly and accurately.
Conversion Formula
dm² = cmil × 5.067074791e-8
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 Decimeters
A square decimeter (dm²) is a metric area unit equal to 100 square centimeters (10 cm × 10 cm) or 0.01 square meters. It represents roughly the footprint of a large paperback book or a standard floor tile. While less common in everyday language than cm² or m², square decimeters appear in cooking (pan sizes), packaging design, and as a useful stepping stone in metric calculations - notably, exactly 1 liter of liquid forms a layer 1 dm² × 1 cm deep.
Quick Reference Table
| Circular Mils (cmil) | Square Decimeters (dm²) |
|---|---|
| 1 cmil | 5.067 × 10-8 dm² |
| 2 cmil | 1.013 × 10-7 dm² |
| 5 cmil | 2.534 × 10-7 dm² |
| 10 cmil | 5.067 × 10-7 dm² |
| 25 cmil | 1.267 × 10-6 dm² |
| 50 cmil | 2.534 × 10-6 dm² |
| 100 cmil | 5.067 × 10-6 dm² |