Section to Square Foot (US Survey) Converter
Unit Converter
Instant · Precise · Universal
23 units available
6 categories total
How to Convert Section to Square Foot (US Survey)
To convert sections to acres: multiply by 640. To km²: multiply by 2.59.
1 section = 1 mi² = 640 acres = 2.59 km². 36 sections = 1 township.
For example, 1 Section (section) = 27878288.49 Square Foot (US Survey) (ft² (US)).
Section to Square Foot (US Survey) — Common Values
| Section (section) | Square Foot (US Survey) (ft² (US)) |
|---|---|
| 0.1 | 2787828.849 |
| 0.5 | 13939144.24 |
| 1 | 27878288.49 |
| 2 | 55756576.97 |
| 5 | 139391442.4 |
| 10 | 278782884.9 |
| 25 | 696957212.2 |
| 50 | 1393914424 |
| 100 | 2787828849 |
| 500 | 13939144240 |
| 1000 | 27878288490 |
About Section (section)
Definition
A section is a unit of land area equal to 1 square mile (640 acres or 2.59 km²), used in the US Public Land Survey System.
Mathematical Relationship
1 section = 1 mi² = 640 acres = 2.59 km². 36 sections = 1 township.
Conversion Formula
To convert sections to acres: multiply by 640. To km²: multiply by 2.59.
Practical Applications
Rural property descriptions, agricultural land division, mineral rights, and road grid planning in the western US.
Interesting Facts
Section 16 in every township was traditionally reserved for public schools — a major source of early American education funding.
Common Mistakes
Forgetting that sections are numbered in a specific serpentine pattern within a township (1 in NE, snaking to 36).
Educational Tips
The US west of Ohio is largely divided into a grid of 1-mile sections. Look at Google Maps in rural areas to see the grid patterns.
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).