Convert square millimetre to square inch


mm squared
square inch


Did you mean to convert mm squared to square inch
square inch [survey]

More information from the unit converter

How many mm squared in 1 square inch? The answer is 645.16. We assume you are converting between square millimetre and square inch. You can view more details on each measurement unit: mm squared or square inch The SI derived unit for area is the square meter. 1 square meter is equal to 1000000 mm squared, or 1550.0031000062 square inch. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between square millimeters and square inches. Type in your own numbers in the form to convert the units!



Quick conversion chart of mm squared to square inch

1 mm squared to square inch = 0.00155 square inch

10 mm squared to square inch = 0.0155 square inch

50 mm squared to square inch = 0.0775 square inch

100 mm squared to square inch = 0.155 square inch

200 mm squared to square inch = 0.31 square inch

500 mm squared to square inch = 0.775 square inch

1000 mm squared to square inch = 1.55 square inch


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Common area conversions


Definition: Square inch

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


Metric conversions and more

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, 70 kg, 150 lbs, US fluid ounce, 6'3", 10 stone 4, cubic cm, metres squared, grams, moles, feet per second, and many more!