Convert square feet to acres
1 ft² = 0.0000229568411387 ac — exactly. Both units are defined against the SI, so this factor is a fraction, not an approximation.
0.000 022 956 841 138 7ac
As a fraction: 1/43560
1 ft² = 0.0000229568411387 ac
How to convert square feet to acres
Multiply the number of square feet by 0.0000229568411387 to get acres.
Acre: Exactly 4840 square yards — historically a day of ploughing.
Square foot to Acre conversion table
| Square feet (ft²) | Acres (ac) |
|---|---|
| 1 ft² | 0.000 022 956 841 |
| 2 ft² | 0.000 045 913 682 |
| 3 ft² | 0.000 068 870 523 |
| 5 ft² | 0.000 114 784 21 |
| 10 ft² | 0.000 229 568 41 |
| 20 ft² | 0.000 459 136 82 |
| 25 ft² | 0.000 573 921 03 |
| 50 ft² | 0.001 147 842 1 |
| 100 ft² | 0.002 295 684 1 |
| 250 ft² | 0.005 739 210 3 |
| 500 ft² | 0.011 478 421 |
| 1000 ft² | 0.022 956 841 |
Acre to Square foot conversion table
| Acres (ac) | Square feet (ft²) |
|---|---|
| 1 ac | 43 560 |
| 2 ac | 87 120 |
| 3 ac | 130 680 |
| 5 ac | 217 800 |
| 10 ac | 435 600 |
| 20 ac | 871 200 |
| 25 ac | 1 089 000 |
| 50 ac | 2 178 000 |
| 100 ac | 4 356 000 |
| 250 ac | 10 890 000 |
| 500 ac | 21 780 000 |
| 1000 ac | 43 560 000 |
Frequently asked
How many acres are in a square foot?
One square foot equals 0.00002295684114 acres (ft² → ac). That figure is exact, not rounded.
How do you convert square feet to acres?
Multiply the number of square feet by 0.0000229568411387 to get acres.
What is 1 ac in square feet?
One acre is 43560 square feet.
What is 10 ft² in ac?
10 ft² = 0.000 229 568 41 ac.
What exactly is a acre?
Exactly 4840 square yards — historically a day of ploughing.