Convert Section to Square US Survey Mile
Convert sections to square us survey miles instantly. 1 section = 0.9999960001 square us survey mile — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square US Survey Mile to Section converter for the reverse conversion.
Units explained
Section
A section is a unit of area used in the US Public Land Survey System, equal to 1 square mile (640 acres or approximately 2.59 km²).
Defined by the Land Ordinance of 1785 as 1/36 of a township. Sections are numbered 1-36 within each township.
Sections are the fundamental unit of US public land records in PLSS states (essentially the central and western US). Property descriptions like 'NE quarter of section 14, township 3 north, range 2 east' use this system.
Defined by the US Land Ordinance of 1785.
Square US Survey Mile
A square US survey mile is approximately 2,589,998 m², slightly larger than the international square mile.
Derived by squaring the US survey mile (5280 US survey feet).
Square US survey miles appear in older US Public Land Survey System records and state plane coordinate systems pre-dating 2023.
Defined in 1893; retired January 2023.
Section to Square US Survey Mile conversion formula
The relationship between sections and square us survey miles:
To convert sections to square us survey miles, multiply the value in sections by 0.9999960001. To reverse, multiply square us survey miles by 1.0000039999.
How to use this converter
Type a value into the calculator. The result in square us survey miles updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square US Survey Mile to Section converter for the reverse direction.
Step-by-step: convert sections to square us survey miles
- Write down the value in sections (sec).
- Multiply that value by the factor 0.9999960001.
- The product is the equivalent value in square us survey miles (smi²).
- To reverse, multiply the square us survey mile value by 1.0000039999.
Worked examples
Example 1 — Convert 1 sec to smi²:
1 × 0.9999960001 = 0.9999960001 smi²
Example 2 — Convert 100 sec to smi²:
100 × 0.9999960001 = 99.9996000127 smi²
Section to Square US Survey Mile conversion table
Standard reference values for converting sections to square us survey miles:
| Section [sec] | Square US Survey Mile [smi²] |
|---|---|
| 0.01 | 0.00999996 |
| 0.1 | 0.0999996 |
| 1 | 0.9999960001 |
| 2 | 1.9999920003 |
| 3 | 2.9999880004 |
| 4 | 3.9999840005 |
| 5 | 4.9999800006 |
| 10 | 9.9999600013 |
| 20 | 19.9999200025 |
| 30 | 29.9998800038 |
| 40 | 39.9998400051 |
| 50 | 49.9998000064 |
| 100 | 99.9996000127 |
| 500 | 499.9980000637 |
| 1000 | 999.9960001274 |
Frequently asked questions
How many square us survey miles is 1 section?
How do I convert sections to square us survey miles?
How do I convert square us survey miles back to sections?
How many square us survey miles is 100 sections?
Popular area unit conversions
Convert Section to other area units
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Metric / SI (5 units)
Imperial / US Customary (3 units)
Sources & references
Conversion factor (1 sec = 0.9999960001 smi²) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Hydrographic Organization — Resolution on the Nautical Mile
International authority that standardised the nautical mile at exactly 1852 m in 1929 — the value adopted worldwide for sea and air navigation.