Convert Square Foot to Acre
Use this free converter to change square feet (ft²) into acres (ac). Square foot and acre both measure area. As a quick reference, 1 ft² equals 0.000022956841 ac, and 1 ac equals 43560 ft².
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Acre (ac)
0.000022956841
1 ft² = 0.000022956841 ac
Area conversion table
| Square Foot | Acre |
|---|---|
| 0.01 | 2.2957e-7 |
| 0.1 | 0.0000022956841 |
| 0.5 | 0.000011478421 |
| 1 | 0.000022956841 |
| 2 | 0.000045913682 |
| 3 | 0.000068870523 |
| 5 | 0.00011478421 |
| 10 | 0.00022956841 |
| 20 | 0.00045913682 |
| 25 | 0.00057392103 |
| 50 | 0.0011478421 |
| 100 | 0.0022956841 |
| 1,000 | 0.022956841 |
How to convert Square Foot to Acre
Multiply the square foot value by 0.000022956841 to get acres.
- Enter the number of square feet you want to convert.
- The converter instantly shows the equivalent value in acres.
- Worked example: 15 ft² × 0.000022956841 = 0.00034435262 ac.
- Use the swap button to reverse the conversion (acre to square foot).
About these units
Square Foot (ft²)
- Definition
- A square foot (ft²) is the area of a square one foot on each side, about 0.093 square meters.
- History
- It derives from the foot and is deeply embedded in US and UK property practice.
- Current use
- Square feet are the standard unit for real-estate floor area in the US and UK.
Acre (ac)
- Definition
- An acre (ac) is a unit of land area equal to 43,560 square feet, or about 4,047 square meters.
- History
- Originally the area a yoke of oxen could plough in a day, it was standardised in medieval England.
- Current use
- Acres measure farmland and real-estate plots in the US and UK.
Frequently asked questions
How many acres are in a square foot?
There are 0.000022956841 ac in 1 ft². To convert, multiply the number of square feet by 0.000022956841.
How do I convert square feet to acres?
Multiply the square foot value by 0.000022956841 to get acres. For example, 10 ft² = 0.00022956841 ac.
Is this square foot-to-acre converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Square Foot to other area units
| Unit | 1 Square Foot equals |
|---|---|
| Square Meter (m²) | 0.09290304 m² |
| Square Kilometer (km²) | 9.2903e-8 km² |
| Square Centimeter (cm²) | 929.0304 cm² |
| Square Mile (mi²) | 3.5870e-8 mi² |
| Square Yard (yd²) | 0.11111111 yd² |
| Square Inch (in²) | 144 in² |
| Acre (ac) | 0.000022956841 ac |
| Hectare (ha) | 0.000009290304 ha |