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Convert square feet to square mm, square mm to square feet - Area Conversion

Convert ft2 to mm2

ft2
mm2

Convert mm2 to ft2

mm2
ft2

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.

Conversion Definitions

The following is a list of definitions relating to conversions between square feet and square millimeters.

What is a square foot (ft2)?

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.

What is a square millimeter (mm2)?

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.

Understanding the Area Units

This table provides a summary of the Area units within their respective measurement systems.

Unit Symbol Measurement System Description
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