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