Online calculators to convert square feet to square millimeters (ft^{2} to mm^{2}) and square millimeters to square feet (mm^{2} to ft^{2}). 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 ft^{2} to mm^{2} or convert mm^{2} to ft^{2}.
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 ft^{2} 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 mm^{2}. 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.
Unit | Symbol | Measurement System | Description |
---|---|---|---|
square inches | in^{2} or sq in | US Customary Units/Imperial System | |
square feet | ft^{2} or sq ft | US Customary Units/Imperial System | 1 ft^{2} = 144 in^{2} |
square yards | yd^{2} or sq yd | US Customary Units/Imperial System | 1 yd^{2} = 9 ft^{2} |
acres | ac | US Customary Units/Imperial System | 1 ac = 4,840 yd^{2} |
square miles | mi^{2} or sq mi | US Customary Units/Imperial System | 1 mi^{2} = 640 ac |
square millimeters | mm^{2} | Metric System | |
square centimeters | cm^{2} | Metric System | 1 cm^{2} = 100 mm^{2} |
square decimeters | dm^{2} | Metric System | 1 dm^{2} = 100 cm^{2} |
square meters | m^{2} | Metric System | 1 m^{2} = 100 dm^{2} |
hectares | ha | Metric System | 1 ha = 10,000 m^{2} |
square kilometer | km^{2} | Metric System | 1 km^{2} = 100 ha |
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