How many square foot are in one acre?
One acre is 43560 ft².
Acre to Square foot
Type a value to convert it from acre to square foot. One ac equals 43560 ft².
Result
Acre and Square foot, side by side
One acre is 43560 ft². In the other direction, one square foot is 0.00002296 ac.
The factor is exact rather than rounded: the imperial units have been defined from the metric ones since 1959, so the conversion introduces no error of its own. What you see below is arithmetic, not an approximation.
| Acre | Square foot |
|---|---|
| 1 | 43560 |
| 10 | 435600 |
| 50 | 2178000 |
| 100 | 4356000 |
| 500 | 21780000 |
| 1000 | 43560000 |
Frequently asked questions
How do I convert square foot back to acre?
One square foot is 0.00002296 ac. The tool above converts in both directions.
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