How many square millimeter in 1 in^2? 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 in^2 The SI derived unit for area is the square meter. 1 square meter is equal to 1000000 square millimeter, or 1550.0031000062 in^2. 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!
1 square millimeter to in^2 = 0.00155 in^2
10 square millimeter to in^2 = 0.0155 in^2
50 square millimeter to in^2 = 0.0775 in^2
100 square millimeter to in^2 = 0.155 in^2
200 square millimeter to in^2 = 0.31 in^2
500 square millimeter to in^2 = 0.775 in^2
1000 square millimeter to in^2 = 1.55 in^2
You can do the reverse unit conversion from in^2 to square millimeter, or enter any two units below:
A square inch is by definition the area enclosed by a square with sides each 1 inch long.
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!