Convert Square Millimeter to Square Link
Convert square millimeters to square links instantly. 1 square millimeter = 2.471054e-5 square link — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Link to Square Millimeter converter for the reverse conversion.
Units explained
Square Millimeter
A square millimeter is a metric unit of area equal to 10⁻⁶ m² (1 mm × 1 mm). It is widely used in engineering, electronics, and small-scale technical work.
Derived by squaring the millimeter, defined as 1/1000 of a meter. The milli- prefix comes from the Latin 'mille' (thousand).
Square millimeters express PCB trace cross-sections, the area of small mechanical features in CAD drawings, biological sample sizes, and material thicknesses.
Millimeter has been part of the metric system since 1795.
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 Millimeter to Square Link conversion formula
The relationship between square millimeters and square links:
To convert square millimeters to square links, multiply the value in square millimeters by 2.471054e-5. To reverse, multiply square links by 40468.564.
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 Millimeter converter for the reverse direction.
Step-by-step: convert square millimeters to square links
- Write down the value in square millimeters (mm²).
- Multiply that value by the factor 2.471054e-5.
- The product is the equivalent value in square links (lk²).
- To reverse, multiply the square link value by 40468.564.
Worked examples
Example 1 — Convert 1 mm² to lk²:
1 × 2.471054e-5 = 2.471054e-5 lk²
Example 2 — Convert 100 mm² to lk²:
100 × 2.471054e-5 = 0.0024710538 lk²
Real-world example — Plastic film and laminate thickness
A 500-square millimeter sheet is a typical spec for ID-card laminates and film overlays. Converting to square links aligns the value with the unit most CAD systems and material datasheets prefer.
500 mm² × 2.471054e-5 = 0.0123552691 lk²
Real-world example — Packaging gauge
A 4-square millimeter plastic bag thickness is a common spec for grocery and freezer bags. Converting from square millimeters to square links is what packaging buyers do whenever they bridge US and metric supplier quotes.
4 mm² × 2.471054e-5 = 9.884215e-5 lk²
Square Millimeter to Square Link conversion table
Standard reference values for converting square millimeters to square links:
| Square Millimeter [mm²] | Square Link [lk²] |
|---|---|
| 0.01 | 2.471054e-7 |
| 0.1 | 2.471054e-6 |
| 1 | 2.471054e-5 |
| 2 | 4.942108e-5 |
| 3 | 7.413161e-5 |
| 4 | 9.884215e-5 |
| 5 | 0.0001235527 |
| 10 | 0.0002471054 |
| 20 | 0.0004942108 |
| 30 | 0.0007413161 |
| 40 | 0.0009884215 |
| 50 | 0.0012355269 |
| 100 | 0.0024710538 |
| 500 | 0.0123552691 |
| 1000 | 0.0247105383 |
Frequently asked questions
How many square links is 1 square millimeter?
How do I convert square millimeters to square links?
How do I convert square links back to square millimeters?
How many square links is 100 square millimeters?
Popular area unit conversions
Convert Square Millimeter to other area units
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Metric / SI (15 units)
Imperial / US Customary (15 units)
US Survey (5 units)
Indian Subcontinent (16 units)
Other Regional (10 units)
Scientific / Physics (5 units)
Sources & references
Conversion factor (1 mm² = 2.471054e-5 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 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.