square feet to acres
Convert square foot to acre — instant, free, with the formula shown.
1 ft²=2.2957e-5 ac
How to convert square foot to acre
To convert square foot to acre, multiply by 2.2957e-5:
ac = ft² × 2.2957e-5
For example, 10 ft² × 2.2957e-5 = 0.00023 ac.
ft² to ac conversion table
| square feet (ft²) | acres (ac) |
|---|---|
| 1 ft² | 2.2957e-5 ac |
| 2 ft² | 4.5914e-5 ac |
| 5 ft² | 0.000115 ac |
| 10 ft² | 0.00023 ac |
| 25 ft² | 0.000574 ac |
| 50 ft² | 0.001148 ac |
| 100 ft² | 0.002296 ac |
| 250 ft² | 0.005739 ac |
| 500 ft² | 0.011478 ac |
| 1000 ft² | 0.022957 ac |
Other square foot conversions
Convert to acre from another unit
ft² to ac — frequently asked
How many acres are in 1 square foot?
1 square foot = 2.2957e-5 acres (ft² × 2.2957e-5 = ac).
What is the formula to convert square foot to acre?
Multiply your square foot value by 2.2957e-5 to get acre.
How do I convert 10 square feet to acres?
10 ft² = 0.00023 ac. For 100 ft² the answer is 0.002296 ac. Use the calculator on this page for any other value.