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Square foot to Acre
Convert square foot (ft²) to acre (ac) — with the exact factor, a quick-reference table and a free converter that works offline.
1 ft² = 0.00002295684 ac
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Conversion table
| Square foot (ft²) | Acre (ac) |
|---|---|
| 100 ft² | 0.002295684 ac |
| 500 ft² | 0.01147842 ac |
| 1,000 ft² | 0.02295684 ac |
| 5,000 ft² | 0.1147842 ac |
| 10,000 ft² | 0.2295684 ac |
| 50,000 ft² | 1.147842 ac |
| 100,000 ft² | 2.295684 ac |
| 500,000 ft² | 11.47842 ac |
How the conversion works
Both units measure area. One square foot equals exactly 0.00002295684 ac, so multiply by that factor to convert.
FAQ
How many acres in a square foot?
1 ft² = 0.00002295684 ac.
How do I convert square foot to acre?
Multiply the square foot value by 0.00002295684. For example, 10 ft² × 0.00002295684 = 0.0002295684 ac.
Where does the factor come from?
The conversion factor is defined in NIST SP 811; both units are area units converted through square meter.
Related conversions
Conversion factors: NIST SP 811. Computed by the same engine that powers the app.
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