Use these online calculators to convert between square feet (ft2) and acres (ac). These Area conversion calculators provide a quick and easy way to convert square feet to acres, or acres to square feet.
Enter your value in one of the conversion calculators below to convert ft2 to acres or convert acres to ft2.
How to convert ft2 to acres: Use the conversion calculator titled "Convert ft2 to acres". Enter a value in the ft2 field and click on the "Calculate acres" button. Your answer will appear in the acres field.
How to convert acres to ft2: Use the conversion calculator titled "Convert acres to ft2". Enter a value in the acres 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 acres.
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.
An acre is a unit of area in both US Customary Units as well as the Imperial System. The symbol for acre is ac. There are 4,840 square yards in an acre or 43,560 square feet in an acre.
There are 43,560 square feet in an acre.
There are 0.00002 acres in a square foot.
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|