Square feet to acres
Type a value in square feet to see it in acres straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the square feet box.
- Read the result in acres as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
ac = ft² × 0.00002295684114
Multiply the value in square feet by 0.00002295684114 to get acres.
Example
To convert 25 ft² to acres: 25 × 0.00002295684114 = 0.000573921 ac.
Conversion table
| Square feet (ft²) | Acres (ac) |
|---|---|
| 1 | 0.0000229568 |
| 2 | 0.0000459137 |
| 3 | 0.0000688705 |
| 5 | 0.000114784 |
| 10 | 0.000229568 |
| 20 | 0.000459137 |
| 25 | 0.000573921 |
| 50 | 0.00114784 |
| 100 | 0.00229568 |
| 250 | 0.00573921 |
| 500 | 0.0114784 |
| 1,000 | 0.0229568 |
About the units
- Square foot
- A square foot is exactly 0.09290304 square meter, widely used for apartment and office sizes.
- Acre
- The international acre is 43,560 square feet, exactly 4046.8564224 square meters, used for land in the US and UK.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many acres are in one square foot?
1 ft² = 0.0000229568 ac exactly.
How do I convert square feet to acres?
Use ac = ft² × 0.00002295684114. For example, 25 ft² = 0.000573921 ac.
How many square feet are in one acre?
1 ac = 43,560 ft².
How do I convert square meters to square feet?
Divide the square meters by 0.09290304, or multiply by about 10.7639. The factor is exact because a foot is exactly 0.3048 m.
Are the dunam, feddan and acre the same size?
No. A metric dunam is 1000 m², an Iraqi dunam 2500 m², an Egyptian feddan about 4200.83 m² and an acre 4046.8564224 m².