How to convert ft2 to mm2: Use the conversion calculator on the left titled "Convert ft2 to mm2". Enter a value in the ft2 field and click on the "Calculate square mm" button. Your answer will appear in the mm2 field.
How to convert mm2 to ft2: Use the conversion calculator on the right titled "Convert mm2 to ft2". Enter a value in the mm2 field and click on the "Calculate square feet" button. Your answer will appear in the ft2 field.
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 (and Imperial)|
|square feet||ft2 or sq ft||US Customary Units (and Imperial)||1 ft2 = 144 in2|
|square yards||yd2 or sq yd||US Customary Units (and Imperial)||1 yd2 = 9 ft2|
|acres||ac||US Customary Units (and Imperial)||1 ac = 4,840 yd2|
|square miles||mi2 or sq mi||US Customary Units (and Imperial)||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|