Use the online conversion calculator below to convert from either **circular mils (cmils) to square mils **or **square mils to circular mils (cmils)**.

**Note: **The results of this calculator should only serve as a **guide**.

Alternatively, you can convert from circular mils to square mils and back using the formula below.

### Formula for converting circular mils (cmils) to square mils

You can convert circular mils (cmils) to square mils and from square mils to circular mils using the conversions below:

- 1 square mil = 1.27388 circular mils (cmils)
- 1 circular mil(cmil) = 0.785 square mils

**Related Topics**

Convert AWG to mm

Convert kcmil to sqmm, mm and inches

Convert circular mils (cmils) to mils