Convert circular mil to square millimeter

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

1 circ mil = 0.000506707479 mm^2. To convert circular mil to square millimeter, multiply the value by 0.000506707479; to go the other way, divide by it (1 mm^2 = 1973.52524177 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 = 0.000506707479 mm^2
  • 1 mm^2 = 1973.52524177 circ mil
  • 10 circ mil = 0.00506707479 mm^2
  • 100 circ mil = 0.0506707479 mm^2



How to Convert Circular Mil to Square Millimeter

1 circ mil = 0.000506707479 mm^2

Example: convert 15 circ mil to mm^2:
15 circ mil = 15 × 0.000506707479 mm^2 = 0.007600612185 mm^2


Circular Mil to Square Millimeter Conversion Table

circular mil square millimeter
1 circ mil 0.000506707479 mm^2
2 circ mil 0.001013414958 mm^2
3 circ mil 0.001520122437 mm^2
5 circ mil 0.002533537395 mm^2
10 circ mil 0.00506707479 mm^2
20 circ mil 0.01013414958 mm^2
50 circ mil 0.02533537395 mm^2
100 circ mil 0.0506707479 mm^2
500 circ mil 0.2533537395 mm^2
1000 circ mil 0.506707479 mm^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 Millimeter

A square millimeter (mm²) is a unit of area equal to the area of a square with sides measuring one millimeter.

History/Origin

The square millimeter has been used in scientific and engineering contexts for precise measurement of small areas, especially in fields like electronics and material science, as a subdivision of the metric system established in the 19th century.

Current Use

It is commonly used today in fields such as electronics, manufacturing, and scientific research to measure small surface areas, including the cross-sectional areas of wires and components.


Frequently Asked Questions

What is 1 circular mil in square millimeter?

1 circular mil (circ mil) = 0.000506707479 square millimeter (mm^2).

How do you convert circular mil to square millimeter?

Multiply the circular mil value by 0.000506707479. For example, 25 circ mil × 0.000506707479 = 0.012667686975 mm^2.

What is 10 circular mil in square millimeter?

10 circ mil = 0.00506707479 mm^2.

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

The square millimeter is the larger unit: 1 circ mil equals only 0.000506707479 mm^2.