Acre (US Survey) to Square Foot Converter
Unit Converter
Instant · Precise · Universal
23 units available
6 categories total
How to Convert Acre (US Survey) to Square Foot
To convert US survey acres to m²: multiply by 4,046.873. To international acres: multiply by ~1.000004.
1 US survey acre ≈ 4,046.873 m². Differs from international acre (4,046.856 m²) by about 0.016 m².
For example, 1 Acre (US Survey) (ac (US)) = 43560.17424 Square Foot (ft²).
Acre (US Survey) to Square Foot — Common Values
| Acre (US Survey) (ac (US)) | Square Foot (ft²) |
|---|---|
| 0.1 | 4356.017424 |
| 0.5 | 21780.08712 |
| 1 | 43560.17424 |
| 2 | 87120.34848 |
| 5 | 217800.8712 |
| 10 | 435601.7424 |
| 25 | 1089004.356 |
| 50 | 2178008.712 |
| 100 | 4356017.424 |
| 500 | 21780087.12 |
| 1000 | 43560174.24 |
About Acre (US Survey) (ac (US))
Definition
The US survey acre is a historical unit of area based on the US survey foot, equal to approximately 4,046.873 m².
Mathematical Relationship
1 US survey acre ≈ 4,046.873 m². Differs from international acre (4,046.856 m²) by about 0.016 m².
Conversion Formula
To convert US survey acres to m²: multiply by 4,046.873. To international acres: multiply by ~1.000004.
Practical Applications
Historical US land surveys, old property deeds, and State Plane Coordinate System calculations.
Interesting Facts
The difference between US survey and international acre is about 0.016 m² — roughly the area of a sheet of paper. Over large areas, it adds up.
Common Mistakes
Using US survey acre in new calculations — it's been deprecated since 2023. Use the international acre instead.
Educational Tips
As of 2023, the US survey foot and acre are retired. All US measurements now use the international definitions.
About Square Foot (ft²)
Definition
The square foot is an imperial unit of area equal to the area of a square with sides of exactly one foot (0.0929 m²).
Mathematical Relationship
1 ft² = 144 in² = 0.0929 m² ≈ 929 cm². 9 ft² = 1 yd². 43,560 ft² = 1 acre.
Conversion Formula
To convert ft² to m²: multiply by 0.0929. To acres: divide by 43,560.
Practical Applications
Home and apartment sizes, office space, flooring calculations, carpet area, and construction specifications.
Interesting Facts
The average new US home is about 2,300 ft² (214 m²). The White House has about 55,000 ft² of floor space.
Common Mistakes
Incorrectly converting: 1 m ≈ 3.28 ft, but 1 m² ≈ 10.76 ft² (not 3.28). You must square the factor.
Educational Tips
A 12" × 12" floor tile = exactly 1 ft². Counting tiles gives you the room's area in square feet directly.