Convert Square Mile to Square Link
Convert square miles to square links instantly. 1 square mile = 6.4e+7 square link — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Link to Square Mile converter for the reverse conversion.
Units explained
Square Mile
A square mile is an imperial unit of area equal to exactly 2,589,988.110336 m². It is used for measuring large land areas in the United States and the United Kingdom.
Derived by squaring the statute mile (5,280 feet). The mile was standardized via the 1959 International Yard and Pound Agreement.
Square miles are used for US and UK regional geography (county areas, lake sizes, large parks), national statistics, and military range descriptions. 1 mi² = 640 acres = 2.589988 km².
Mile dates to Roman antiquity; modern exact value standardized in 1959.
Square Link
A square link is an imperial unit of area equal to approximately 0.0405 m². It is part of the chain-link surveying system used historically for land measurement.
Derived by squaring the link (1/100 of a chain = 7.92 inches). The Gunter's chain was introduced by English mathematician Edmund Gunter in 1620 for land surveying.
Square links appear in historical land surveys and legacy property records, particularly in the US Public Land Survey System (PLSS). Modern surveys use feet or meters instead.
Gunter's chain introduced in 1620; standardized via the 1959 International Yard and Pound Agreement.
Square Mile to Square Link conversion formula
The relationship between square miles and square links:
To convert square miles to square links, multiply the value in square miles by 6.4e+7. To reverse, multiply square links by 1.5625e-8.
How to use this converter
Type a value into the calculator. The result in square links 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 Link to Square Mile converter for the reverse direction.
Step-by-step: convert square miles to square links
- Write down the value in square miles (mi²).
- Multiply that value by the factor 6.4e+7.
- The product is the equivalent value in square links (lk²).
- To reverse, multiply the square link value by 1.5625e-8.
Worked examples
Example 1 — Convert 1 mi² to lk²:
1 × 6.4e+7 = 6.4e+7 lk²
Example 2 — Convert 100 mi² to lk²:
100 × 6.4e+7 = 6.4e+9 lk²
Square Mile to Square Link conversion table
Standard reference values for converting square miles to square links:
| Square Mile [mi²] | Square Link [lk²] |
|---|---|
| 0.01 | 640000.0035425029 |
| 0.1 | 6400000.0354250288 |
| 1 | 6.4e+7 |
| 2 | 1.28e+8 |
| 3 | 1.92e+8 |
| 4 | 2.56e+8 |
| 5 | 3.2e+8 |
| 10 | 6.4e+8 |
| 20 | 1.28e+9 |
| 30 | 1.92e+9 |
| 40 | 2.56e+9 |
| 50 | 3.2e+9 |
| 100 | 6.4e+9 |
| 500 | 3.2e+10 |
| 1000 | 6.4e+10 |
Frequently asked questions
How many square links is 1 square mile?
How do I convert square miles to square links?
How do I convert square links back to square miles?
How many square links is 100 square miles?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 mi² = 6.4e+7 lk²) 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 Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.