Square feet to acres
1 square foot = 0.000023 acres
For any other value: ac = sq ft × 0.0000229568
Calculator
0.00023 ac
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You can leave the unit in: 100 sq ft is fine.
Square feet to acres chart
The values people look up most.
| square feet | acres |
|---|---|
| 10 sq ft | 0.00023 ac |
| 10000 sq ft | 0.23 ac |
| 8712 sq ft | 0.2 ac |
| 6 sq ft | 0.000138 ac |
| 9000 sq ft | 0.207 ac |
| 43560 sq ft | 1 ac |
| 6000 sq ft | 0.138 ac |
| 15 sq ft | 0.000344 ac |
| 5 sq ft | 0.000115 ac |
| 12 sq ft | 0.000275 ac |
| 5000 sq ft | 0.115 ac |
| 30000 sq ft | 0.689 ac |
| 9500 sq ft | 0.218 ac |
| 8700 sq ft | 0.2 ac |
| 7400 sq ft | 0.17 ac |
| 8 sq ft | 0.000184 ac |
| 8276 sq ft | 0.19 ac |
| 20 sq ft | 0.000459 ac |
| 7000 sq ft | 0.161 ac |
| 16 sq ft | 0.000367 ac |
| 16000 sq ft | 0.367 ac |
| 20000 sq ft | 0.459 ac |
| 9 sq ft | 0.000207 ac |
| 100 sq ft | 0.0023 ac |
| 11 sq ft | 0.000253 ac |
| 18000 sq ft | 0.413 ac |
| 10454 sq ft | 0.24 ac |
| 8000 sq ft | 0.184 ac |
Formula
ac = sq ft × 0.0000229568
An acre is 43,560 square feet — about the size of an American football field without the end zones.
Where this number comes from
This factor is exact, not rounded. An acre is 43,560 square feet, by definition.
Source: NIST Guide to the SI, Appendix B: Conversion Factors, NIST (National Institute of Standards and Technology, USA).
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