Online calculators to convert square feet to square millimeters (ft2 to mm2) and square millimeters to square feet (mm2 to ft2). Our conversions provide a quick and easy way to convert between these units.
Enter your value in one of the conversion calculators below to convert ft2 to mm2 or convert mm2 to ft2.
The following is a list of definitions relating to conversions between square feet and square millimeters.
A square foot is a unit of area in both US Customary Units as well as the Imperial System. The symbol for square foot is ft2 or sq ft. There are 144 square inches in a square foot. A square foot is calculated as the area of a square that has 1 foot on each side.
A square milliimeter is a unit of area in the Metric System. The symbol for square millimeter is mm2. There are 1,000,000 square millimeters in a square meter. A square millimeter is calculated as the area of a square that has 1 millimeter on each side. The International spelling is square millimetre.
This table provides a summary of the Area units within their respective measurement systems.
|square inches||in2 or sq in||US Customary Units/Imperial System|
|square feet||ft2 or sq ft||US Customary Units/Imperial System||1 ft2 = 144 in2|
|square yards||yd2 or sq yd||US Customary Units/Imperial System||1 yd2 = 9 ft2|
|acres||ac||US Customary Units/Imperial System||1 ac = 4,840 yd2|
|square miles||mi2 or sq mi||US Customary Units/Imperial System||1 mi2 = 640 ac|
|square millimeters||mm2||Metric System|
|square centimeters||cm2||Metric System||1 cm2 = 100 mm2|
|square decimeters||dm2||Metric System||1 dm2 = 100 cm2|
|square meters||m2||Metric System||1 m2 = 100 dm2|
|hectares||ha||Metric System||1 ha = 10,000 m2|
|square kilometer||km2||Metric System||1 km2 = 100 ha|
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