About the ft² to ac calculation
One square foot is exactly 0.00002296 acres, so converting between them is a single multiplication. Enter any value above and the result updates as you type. How property floor area is quoted in the US, UK and India. The standard land unit in the US and UK — originally the area one ox team could plough in a day.
Formula
ac = ft² × 0.00002296
1 ft² = 0.00002296 ac
1 ac = 43,560 ft²Worked example
To convert 1,000 ft², multiply by 0.00002296: 1,000 × 0.00002296 = 0.022957 ac.
Frequently asked questions
How many acres are in a square foot?
There are 0.00002296 acres in one square foot. To convert any amount, multiply the number of square feet by 0.00002296.
How do I convert acres back to square feet?
Divide instead of multiplying, or equivalently multiply by 43,560. One acre is 43,560 square feet.
Is this conversion exact?
Yes. Since the international agreement of 1959, the relationship between square feet and acres is defined exactly rather than measured, so the only rounding here is in how many decimal places we show.
Where is each of these units used?
Square Feet: how property floor area is quoted in the US, UK and India. Acres: the standard land unit in the US and UK — originally the area one ox team could plough in a day.
Sources
- NIST Special Publication 811 — Guide for the Use of the International System of Units