Convert Square Link to Square Mil
Convert square links to square mils instantly. 1 square link = 6.27264e+7 square mil — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Mil 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 Mil
A square mil is an imperial unit of area equal to 6.4516×10⁻¹⁰ m². It is widely used in printed circuit board (PCB) design and electronics manufacturing.
Derived by squaring the mil (1 mil = 1/1000 of an inch = 0.0254 mm). Standardized via the 1959 International Yard and Pound Agreement.
Square mils are the standard unit for PCB trace cross-sections, pad areas, and component pitches in US-localized electronic design software and datasheets.
Standardized via the 1959 International Yard and Pound Agreement.
Square Link to Square Mil conversion formula
The relationship between square links and square mils:
To convert square links to square mils, multiply the value in square links by 6.27264e+7. To reverse, multiply square mils by 1.594225e-8.
How to use this converter
Type a value into the calculator. The result in square mils 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 Mil to Square Link converter for the reverse direction.
Step-by-step: convert square links to square mils
- Write down the value in square links (lk²).
- Multiply that value by the factor 6.27264e+7.
- The product is the equivalent value in square mils (mil²).
- To reverse, multiply the square mil value by 1.594225e-8.
Worked examples
Example 1 — Convert 1 lk² to mil²:
1 × 6.27264e+7 = 6.27264e+7 mil²
Example 2 — Convert 100 lk² to mil²:
100 × 6.27264e+7 = 6.27264e+9 mil²
Real-world example — Small-scale to atomic-scale
One square link equals 10 million square mils — useful for physics curricula that relate everyday measurements to atomic and optical scales.
1 lk² × 6.27264e+7 = 6.27264e+7 mil²
Real-world example — Centimeter to wavelength scale
One square link equals 10 million square mils. Physics curricula use this kind of conversion to relate everyday measurements to atomic and optical scales.
1 lk² × 6.27264e+7 = 6.27264e+7 mil²
Square Link to Square Mil conversion table
Standard reference values for converting square links to square mils:
| Square Link [lk²] | Square Mil [mil²] |
|---|---|
| 0.01 | 627263.9965279931 |
| 0.1 | 6272639.9652799312 |
| 1 | 6.27264e+7 |
| 2 | 1.254528e+8 |
| 3 | 1.881792e+8 |
| 4 | 2.509056e+8 |
| 5 | 3.13632e+8 |
| 10 | 6.27264e+8 |
| 20 | 1.254528e+9 |
| 30 | 1.881792e+9 |
| 40 | 2.509056e+9 |
| 50 | 3.13632e+9 |
| 100 | 6.27264e+9 |
| 500 | 3.13632e+10 |
| 1000 | 6.27264e+10 |
Frequently asked questions
How many square mils is 1 square link?
How do I convert square links to square mils?
How do I convert square mils back to square links?
How many square mils 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 = 6.27264e+7 mil²) 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.