Acre to Square Foot
Free instant acre to square foot converter. 1 ac = 43560 ft².
Common Acre to Square Foot values
| Acre (ac) | Square Foot (ft²) |
|---|---|
| 1 | 43560 |
| 5 | 217800 |
| 10 | 435600 |
| 25 | 1089000 |
| 50 | 2178000 |
| 100 | 4356000 |
| 500 | 21780000 |
| 1000 | 43560000 |
How does Acre to Square Foot conversion work?
Type a value in the Acre (ac) field and the equivalent in Square Foot (ft²) appears instantly to the right. The math uses the exact formula shown above — no rounding errors, no approximations beyond standard floating-point precision. Use the swap button to flip the units and see the inverse conversion.
Acre. The traditional land-area unit in the US, UK, and many former British colonies. About 4,047 square metres.
Square Foot. The standard floor-area unit in the US. About a quarter of a square metre.
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🎯 Accurate conversions
Conversion factors come from the official standard (NIST, BIPM, ISO definitions where applicable). Values are precise to standard floating-point limits.
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