Square Foot (US Survey) to Square Hectometer Converter
Unit Converter
Instant · Precise · Universal
23 units available
6 categories total
How to Convert Square Foot (US Survey) to Square Hectometer
To convert US survey ft² to m²: multiply by 0.09290341. To international ft²: multiply by ~1.000004.
1 ft² (US) ≈ 0.09290341 m². Differs from international ft² (0.09290304 m²) by about 4 × 10⁻⁷ m².
For example, 1 Square Foot (US Survey) (ft² (US)) = 0.000009290341161 Square Hectometer (hm²).
Square Foot (US Survey) to Square Hectometer — Common Values
| Square Foot (US Survey) (ft² (US)) | Square Hectometer (hm²) |
|---|---|
| 0.1 | 9.290341e-7 |
| 0.5 | 0.000004645170581 |
| 1 | 0.000009290341161 |
| 2 | 0.00001858068232 |
| 5 | 0.00004645170581 |
| 10 | 0.00009290341161 |
| 25 | 0.000232258529 |
| 50 | 0.0004645170581 |
| 100 | 0.0009290341161 |
| 500 | 0.004645170581 |
| 1000 | 0.009290341161 |
About Square Foot (US Survey) (ft² (US))
Definition
The US survey square foot is a historical area unit based on the US survey foot (1200/3937 m), equal to approximately 0.09290341 m².
Mathematical Relationship
1 ft² (US) ≈ 0.09290341 m². Differs from international ft² (0.09290304 m²) by about 4 × 10⁻⁷ m².
Conversion Formula
To convert US survey ft² to m²: multiply by 0.09290341. To international ft²: multiply by ~1.000004.
Practical Applications
Historical property records and government land survey documents.
Interesting Facts
The difference from the international square foot is only about 0.4 mm² — negligible for a single measurement, but significant over millions of square feet.
Common Mistakes
Using the US survey foot in new work. Since 2023, only the international foot is valid in the US.
Educational Tips
The US survey foot existed because of a historical definition difference. It's now retired — use the international foot (exactly 0.3048 m).
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.