Convert Square Inches (in²) to Circular Mils (cmil) | in² in cmil

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# Let's convert Square Inches (in²) to Circular Mils (cmil)

This quick and easy calculator will convert Square Inches (in²) to Circular Mils (cmil) and show formula, brief history on the units and quick maths for the conversion.

## Quick Reference for Converting Square Inches to Circular Mils

Formula
cmil = in² x 1273239.49
Quick Rough Maths
To get the Circular Mils, multiply the number of Square Inches by 1.3 million
Square Inches (in²) in 1 Circular Mil
There are 0 Square Inches in 1 Circular Mil
Circular Mils (cmil) in 1 Square Inch
There are 1273239.49 Circular Mils in 1 Square Inch

## Unit Information

Square Inch
/skwɛːˌɪn(t)ʃ/
Symbol: in²
Unit System: Imperial

### What is the Square Inch?

The square inch is a unit of area and is an imperial unit with the symbol in².

One square inch is equal in area to a square with edges one inch in length.

The square inch is a common unit of measurement in the UK and US.

Circular Mil
/ˈsəːkjʊləˌmɪl/
Symbol: cmil
Unit System: Units For Measuring Wire Gauges

### What is the Circular Mil?

The circular mil is a unit designed specifically to measure the area of a wire with a circular cross section. It has the symbol cmil.

An inch is 1000 mils. This makes the circular mil particularly useful for measuring cross sections of wire as there is no need to use the symbol π so the process is simplified.

A circular mil is a very small unit so not advised to use for large areas!

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