How to convert square feet to acres
- Take the value in square feet.
- Use the formula acres = square feet ÷ 43,560.
- For example, 5,000 ft² is 0.115 ac.
About square feet and acres
An acre is exactly 43,560 square feet, so divide square feet by 43,560 to get acres. A quarter acre is 10,890 sq ft and a half acre is 21,780 sq ft.
US property listings often give the house in square feet and the lot in acres, or the lot in square feet when it is small. Converting the lot to acres makes plots easier to compare.
Examples
- 5,000 ft² (a 50 by 100 ft city lot) is 0.115 ac
- 10,890 ft² (a quarter-acre lot) is 0.25 ac
- 57,600 ft² (an American football field with end zones) is 1.32 ac
- 27,878,400 ft² (one square mile) is 640 ac
Square feet to acres chart
| Square feet (ft²) | Acres (ac) |
|---|---|
| 100 | 0.0023 |
| 500 | 0.0115 |
| 1,000 | 0.023 |
| 2,000 | 0.0459 |
| 2,500 | 0.0574 |
| 5,000 | 0.115 |
| 7,500 | 0.172 |
| 10,000 | 0.23 |
| 10,890 | 0.25 |
| 15,000 | 0.344 |
| 20,000 | 0.459 |
| Square feet (ft²) | Acres (ac) |
|---|---|
| 21,780 | 0.5 |
| 25,000 | 0.574 |
| 30,000 | 0.689 |
| 40,000 | 0.918 |
| 43,560 | 1 |
| 50,000 | 1.15 |
| 87,120 | 2 |
| 100,000 | 2.3 |
| 250,000 | 5.74 |
| 500,000 | 11.48 |
| 1,000,000 | 22.96 |