How many square millimeter in 1 square inches? 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 square inches The SI derived unit for area is the square meter. 1 square meter is equal to 1000000 square millimeter, or 1550.0031000062 square inches. 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 square inches = 0.00155 square inches
10 square millimeter to square inches = 0.0155 square inches
50 square millimeter to square inches = 0.0775 square inches
100 square millimeter to square inches = 0.155 square inches
200 square millimeter to square inches = 0.31 square inches
500 square millimeter to square inches = 0.775 square inches
1000 square millimeter to square inches = 1.55 square inches
You can do the reverse unit conversion from square inches 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!