›› Convert square inch to square mil


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›› More information from the unit converter

How many square inch in 1 square mil? The answer is 1.0E-6.
We assume you are converting between square inch and square mil.
You can view more details on each measurement unit:
square inch or square mil
The SI derived unit for area is the square meter.
1 square meter is equal to 1550.0031000062 square inch, or 1550003100.0062 square mil.
Note that rounding errors may occur, so always check the results.
Use this page to learn how to convert between square inches and square mil.
Type in your own numbers in the form to convert the units!


›› Quick conversion chart of square inch to square mil

1 square inch to square mil = 1000000 square mil

2 square inch to square mil = 2000000 square mil

3 square inch to square mil = 3000000 square mil

4 square inch to square mil = 4000000 square mil

5 square inch to square mil = 5000000 square mil

6 square inch to square mil = 6000000 square mil

7 square inch to square mil = 7000000 square mil

8 square inch to square mil = 8000000 square mil

9 square inch to square mil = 9000000 square mil

10 square inch to square mil = 10000000 square mil


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›› Definition: Square inch

A square inch is by definition the area enclosed by a square with sides each 1 inch long.


›› Definition: Square mil

A square mil is defined as the area of a square with sides one mil in length.

The definition of a mil is as follows:

A milliradian, often called a mil or mrad, is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian).

Compass use of mils typically rounds 6283 to 6400 for simplification, but here we use the official definition.


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ConvertUnits.com provides an online conversion calculator for all types of measurement units. You can find metric conversion tables for SI units, as well as English units, currency, and other data. Type in unit symbols, abbreviations, or full names for units of length, area, mass, pressure, and other types. Examples include mm, inch, 100 kg, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!