Convert Square Foot to Acre
Convert Square Foot to Acre instantly. 1 ft² = 0.000023 ac. Formula, worked examples and a quick reference table.
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One square foot equals 0.000023 acre. To convert any number of square foots to acres, multiply by 0.00002296.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Square Foot to Acre formula
To go the other way, use square foot = acre ÷ 0.00002296.
About these units
An acre is 43,560 square feet, historically about the area one person could plough in a day with a yoke of oxen. It is still standard in US and UK land dealings.
Square Foot to Acre conversion table
| Square Foot | Acre |
|---|---|
| 1 ft² | 0 ac |
| 2 ft² | 0 ac |
| 3 ft² | 0.0001 ac |
| 5 ft² | 0.0001 ac |
| 10 ft² | 0.0002 ac |
| 20 ft² | 0.0005 ac |
| 25 ft² | 0.0006 ac |
| 50 ft² | 0.0011 ac |
| 100 ft² | 0.0023 ac |
| 250 ft² | 0.0057 ac |
| 500 ft² | 0.0115 ac |
| 1,000 ft² | 0.023 ac |
Frequently asked questions
How many acres are in a square foot? +
There are 0.000023 acres in one square foot.
What is 10 ft² in ac? +
10 ft² equals 0.0002 ac. Multiply 10 by 0.00002296.
How do I convert acre back to square foot? +
Use square foot = acre ÷ 0.00002296. The converter above handles both directions, or see our dedicated Acre to Square Foot page.