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.
Both square feet (ft2) and acres are units of area in US Customary Units as well as the Imperial System. So when you convert between these units, you are performing a conversion between units within the same measurement system.
Let's take a closer look at the conversion formulas so that you can do these conversions yourself either with a calculator or with an old-fashioned pencil and paper.
The formula to convert from ft2 to acres is:
acres = ft2 ÷ 43,560
The formula to convert from acres to ft2 is:
ft2 = acres x 43,560
Next, let's look at some examples showing the work and calculations that are involved in converting between square feet (ft2) and acres (ac).
Task: Convert 250,000 square feet to acres (show work) Formula: ft2 ÷ 43,560 = acres Calculations: 250,000 ft2 ÷ 43,560 = 5.7392 acres Result: 250,000 ft2 is equal to 5.7392 acres
Task: Convert 20 acres to square feet (show work) Formula: acres x 43,560 = ft2 Calculations: 20 acres x 43,560 = 871,200 ft2 Result: 20 acres is equal to 871,200 ft2
For quick reference purposes, below are conversion tables that you can use to convert from ft2 to acres, and acres to ft2.
|square feet (ft2)||acres (ac)|
|1 ft2||0.00002 acres|
|100 ft2||0.0023 acres|
|250 ft2||0.00574 acres|
|500 ft2||0.01148 acres|
|750 ft2||0.01722 acres|
|1,000 ft2||0.02296 acres|
|2,500 ft2||0.05739 acres|
|5,000 ft2||0.11478 acres|
|10,000 ft2||0.22957 acres|
|25,000 ft2||0.57392 acres|
|50,000 ft2||1.14784 acres|
|100,000 ft2||2.29568 acres|
|250,000 ft2||5.7392 acres|
|500,000 ft2||11.4784 acres|
|750,000 ft2||17.2176 acres|
|1,000,000 ft2||22.9568 acres|
|acres (ac)||square feet (ft2)|
|1 acre||43,560 ft2|
|2 acres||87,120 ft2|
|3 acres||130,680 ft2|
|4 acres||174,240 ft2|
|5 acres||217,800 ft2|
|6 acres||261,360 ft2|
|7 acres||304,920 ft2|
|8 acres||348,480 ft2|
|9 acres||392,040 ft2|
|10 acres||435,600 ft2|
|15 acres||653,400 ft2|
|20 acres||871,200 ft2|
|25 acres||1,089,000 ft2|
|50 acres||2,178,000 ft2|
|75 acres||3,267,000 ft2|
|100 acres||4,356,000 ft2|
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|