Acre (US Survey) to Square Hectometer Converter
Unit Converter
Instant · Precise · Universal
23 units available
6 categories total
How to Convert Acre (US Survey) to Square Hectometer
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)) = 0.404687261 Square Hectometer (hm²).
Acre (US Survey) to Square Hectometer — Common Values
| Acre (US Survey) (ac (US)) | Square Hectometer (hm²) |
|---|---|
| 0.1 | 0.0404687261 |
| 0.5 | 0.2023436305 |
| 1 | 0.404687261 |
| 2 | 0.809374522 |
| 5 | 2.023436305 |
| 10 | 4.04687261 |
| 25 | 10.11718152 |
| 50 | 20.23436305 |
| 100 | 40.4687261 |
| 500 | 202.3436305 |
| 1000 | 404.687261 |
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 Hectometer (hm²)
Definition
The square hectometer is a metric unit of area equal to 10,000 square meters — also known as a hectare.
Mathematical Relationship
1 hm² = 10,000 m² = 1 ha = 100 are = 0.01 km².
Conversion Formula
To convert hm² to acres: multiply by 2.471. To km²: divide by 100. To m²: multiply by 10,000.
Practical Applications
Farm sizes, vineyard areas, national park land parcels, and urban development projects.
Interesting Facts
A standard FIFA football pitch is about 0.7 ha. The Louvre Museum covers about 6 ha.
Common Mistakes
Not realizing hm² and hectare are the same thing. Also, confusing hectare (area) with hectometer (length).
Educational Tips
A hectare = a square 100 m × 100 m. Picture a large athletic field — that's roughly 1 hectare.