Convert Square Link to Square Mile
Convert square links to square miles instantly. 1 square link = 1.5625e-8 square mile — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Mile to Square Link converter for the reverse conversion.
Units explained
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
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 to Square Mile conversion formula
The relationship between square links and square miles:
To convert square links to square miles, multiply the value in square links by 1.5625e-8. To reverse, multiply square miles by 6.4e+7.
How to use this converter
Type a value into the calculator. The result in square 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 Mile to Square Link converter for the reverse direction.
Step-by-step: convert square links to square miles
- Write down the value in square links (lk²).
- Multiply that value by the factor 1.5625e-8.
- The product is the equivalent value in square miles (mi²).
- To reverse, multiply the square mile value by 6.4e+7.
Worked examples
Example 1 — Convert 1 lk² to mi²:
1 × 1.5625e-8 = 1.5625e-8 mi²
Example 2 — Convert 100 lk² to mi²:
100 × 1.5625e-8 = 1.5625e-6 mi²
Real-world example — Hardware-scale dimensions
A 10-square link fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between square links and square miles daily when mixing metric and imperial tools.
10 lk² × 1.5625e-8 = 1.5625e-7 mi²
Real-world example — Postcard and small-object dimensions
A postcard is about 5 square links wide. Converting to square miles is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 lk² × 1.5625e-8 = 7.8125e-8 mi²
Real-world example — Ruler-scale measurements
A 30-square link school ruler converts cleanly to square miles — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 lk² × 1.5625e-8 = 4.6875e-7 mi²
Square Link to Square Mile conversion table
Standard reference values for converting square links to square miles:
| Square Link [lk²] | Square Mile [mi²] |
|---|---|
| 0.01 | 1.5625e-10 |
| 0.1 | 1.5625e-9 |
| 1 | 1.5625e-8 |
| 2 | 3.125e-8 |
| 3 | 4.6875e-8 |
| 4 | 6.25e-8 |
| 5 | 7.8125e-8 |
| 10 | 1.5625e-7 |
| 20 | 3.125e-7 |
| 30 | 4.6875e-7 |
| 40 | 6.25e-7 |
| 50 | 7.8125e-7 |
| 100 | 1.5625e-6 |
| 500 | 7.8125e-6 |
| 1000 | 1.5625e-5 |
Frequently asked questions
How many square miles is 1 square link?
How do I convert square links to square miles?
How do I convert square miles back to square links?
How many square miles is 100 square links?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 lk² = 1.5625e-8 mi²) 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.