Convert square millimetre to square inch


square millimeter
inches squared


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square inch [survey]

More information from the unit converter

How many square millimeter in 1 inches squared? 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: square millimeter or inches squared The SI derived unit for area is the square meter. 1 square meter is equal to 1000000 square millimeter, or 1550.0031000062 inches squared. 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 square millimeter to inches squared

1 square millimeter to inches squared = 0.00155 inches squared

10 square millimeter to inches squared = 0.0155 inches squared

50 square millimeter to inches squared = 0.0775 inches squared

100 square millimeter to inches squared = 0.155 inches squared

200 square millimeter to inches squared = 0.31 inches squared

500 square millimeter to inches squared = 0.775 inches squared

1000 square millimeter to inches squared = 1.55 inches squared


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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!