Mils to Circular Mils Area Calculator

Use this handy calculator to work out the equivalent cross-sectional area of a wire in circular mils from its diameter in mils.

Circular Mils Calculator

*Note: Circular mils are used in the electrical industry as a measure of the cross-sectional area of a wire. The larger the circular mils (cmils) value, the thicker the wire.

Worked Example 1: Convert 500 mils to cmils

Using the calculator, 500 mils =50,000 cmils.

Worked Example 2: Convert 125 mils to cmils

From the calculator, 125 mils equals 15,376 cmils.

Example 3: Convert 100 mils to cmils

Using the calculator, 100 mils =10,000 cmils.

Mils to Circular mils Formula

How to calculate circular mils from mils.

Use this formula below to calculate cmils from mils:

circular mils = (diameter of the wire or conductor in mils) x (diameter of the wire or conductor in mils)

If the diameter of a wire is 100 mils, the circular mils equivalent = (100)² = 10,000 cmils.

Another example:

Using the formula, if the diameter of a conductor is 3 mils, then the circular mils equivalent is 3² = 9 circular mils (cmil). 

Related Questions

Converting mils to inches and mm

Use the calculator below to convert the diameter of a wire in mils to inches or mm.

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Circular Mils to Mils Converter

You can use the converter below to convert from circular mils to mils.

Related Questions

1. Formula to convert Inches to circular mils

To work out circular mils from inches, use the conversion:

1 inch = 1,000,000 circular mils

2. Formula to convert mm to circular mils formula

To work out circular mils from mm, use the conversion:

1 mm = 39,370 circular mils

3. Converting Square mils to Circular mils

A square mil is the area of a square whose sides are 1 mil.

Square mils to circular mils formula

To convert square mils to circular mils, use the formula: 1 circular mil = 1.27323 x number of square mils.

Circular mils to square mils formula

To convert circular mils to square mils, use the formula: 1 square mils = circular mils / 1.27323

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