Township to Square Mile (US Survey) Converter
Unit Converter
Instant · Precise · Universal
23 units available
6 categories total
How to Convert Township to Square Mile (US Survey)
To convert townships to sections: multiply by 36. To acres: multiply by 23,040. To km²: multiply by 93.24.
1 township = 36 sections = 36 mi² = 23,040 acres ≈ 93.24 km².
For example, 1 Township (township) = 35.999856 Square Mile (US Survey) (mi² (US)).
Township to Square Mile (US Survey) — Common Values
| Township (township) | Square Mile (US Survey) (mi² (US)) |
|---|---|
| 0.1 | 3.5999856 |
| 0.5 | 17.999928 |
| 1 | 35.999856 |
| 2 | 71.999712 |
| 5 | 179.99928 |
| 10 | 359.99856 |
| 25 | 899.9964 |
| 50 | 1799.9928 |
| 100 | 3599.9856 |
| 500 | 17999.928 |
| 1000 | 35999.856 |
About Township (township)
Definition
A township (survey) is a unit of land area equal to 36 square miles (93.24 km²), used in the US Public Land Survey System.
Mathematical Relationship
1 township = 36 sections = 36 mi² = 23,040 acres ≈ 93.24 km².
Conversion Formula
To convert townships to sections: multiply by 36. To acres: multiply by 23,040. To km²: multiply by 93.24.
Practical Applications
Legal land descriptions in the western US, mineral rights boundaries, and county subdivision.
Interesting Facts
Indiana was the first state fully surveyed using the township system (1799–1834). The grid is still visible in satellite imagery.
Common Mistakes
Confusing 'township' (the survey unit = 36 mi²) with 'township' as a political subdivision, which can vary in size.
Educational Tips
A township = 6 mi × 6 mi = 36 sections. Each section = 1 mi² = 640 acres. It's a nested grid system.
About Square Mile (US Survey) (mi² (US))
Definition
The US survey square mile is a historical area unit based on the US survey foot, equal to approximately 2,589,998.47 m².
Mathematical Relationship
1 mi² (US) ≈ 2,589,998.47 m². Differs from international mi² (2,589,988.11 m²) by about 10.36 m².
Conversion Formula
To convert US survey mi² to km²: multiply by 2.590. To international mi²: multiply by ~1.000004.
Practical Applications
Historical US Public Land Survey System sections (each nominally 1 mi² US survey).
Interesting Facts
Over one square mile, the US survey definition differs from the international definition by about 10.4 m² — roughly a 3 m × 3.5 m room.
Common Mistakes
Using the US survey mile for new calculations. Deprecated since 2023 — use the international definitions.
Educational Tips
The US Survey system was a legacy from 1893. Its 2023 retirement unified US measurements with the international standard.