Convert circular mil to square inch

Please provide values below to convert circular mil [circ mil] to square inch [in^2], or Convert square inch to circular mil.

1 circ mil = 7.85398163246e-07 in^2. To convert circular mil to square inch, multiply the value by 7.85398163246e-07; to go the other way, divide by it (1 in^2 = 1273239.54498 circ mil). Both units measure area and appear in everyday as well as technical calculations, so switching between them quickly is often useful.

Quick Reference

  • 1 circ mil = 7.85398163246e-07 in^2
  • 1 in^2 = 1273239.54498 circ mil
  • 10 circ mil = 7.85398163246e-06 in^2
  • 100 circ mil = 7.85398163246e-05 in^2



How to Convert Circular Mil to Square Inch

1 circ mil = 7.85398163246327e-07 in^2

Example: convert 15 circ mil to in^2:
15 circ mil = 15 × 7.85398163246327e-07 in^2 = 1.17809724486949e-05 in^2


Circular Mil to Square Inch Conversion Table

circular mil square inch
1 circ mil 7.85398163246e-07 in^2
2 circ mil 1.57079632649e-06 in^2
3 circ mil 2.35619448974e-06 in^2
5 circ mil 3.92699081623e-06 in^2
10 circ mil 7.85398163246e-06 in^2
20 circ mil 1.57079632649e-05 in^2
50 circ mil 3.92699081623e-05 in^2
100 circ mil 7.85398163246e-05 in^2
500 circ mil 0.000392699081623 in^2
1000 circ mil 0.000785398163246 in^2

Circular Mil

A circular mil is a unit of area used to measure the cross-sectional size of wires, representing the area of a circle with a diameter of one mil (one thousandth of an inch).

History/Origin

The circular mil originated in the electrical industry to specify wire sizes before the adoption of metric units. It has been a standard measurement in North America for wire gauge sizes for many decades.

Current Use

Circular mils are still used today in the electrical industry to specify wire cross-sectional areas, especially in North America, although metric units are increasingly common.


Square Inch

A square inch is a unit of area measurement equal to the area of a square with sides of one inch.

History/Origin

The square inch has been used historically in the imperial and US customary systems for measuring small areas, especially in engineering, manufacturing, and real estate, dating back to the adoption of the inch as a standard unit of length.

Current Use

Today, the square inch is still used in various fields such as printing, screen sizes, and material measurements, although the square meter is more common internationally. It remains a standard unit within the 'Area' converter in measurement tools and applications.


Frequently Asked Questions

What is 1 circular mil in square inch?

1 circular mil (circ mil) = 7.85398163246e-07 square inch (in^2).

How do you convert circular mil to square inch?

Multiply the circular mil value by 7.85398163246e-07. For example, 25 circ mil × 7.85398163246e-07 = 1.96349540812e-05 in^2.

What is 10 circular mil in square inch?

10 circ mil = 7.85398163246e-06 in^2.

Which unit is larger, the circular mil or the square inch?

The square inch is the larger unit: 1 circ mil equals only 7.85398163246e-07 in^2.