Convert Square Thou to Square Link
Convert square thous to square links instantly. 1 square thou = 1.594225e-8 square link — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Link to Square Thou converter for the reverse conversion.
Units explained
Square Thou
A square thou is an imperial unit of area equal to 6.4516×10⁻¹⁰ m², identical to the square mil. The word 'thou' is short for 'thousandth' (of an inch).
Identical in value to the square mil; 'thou' is the British engineering term, 'mil' is the American term. Both refer to 1/1000 of an inch.
Square thous are used in British and Commonwealth engineering contexts where 'thou' is preferred over 'mil', particularly in mechanical engineering tolerance specifications.
Standardized via the 1959 International Yard and Pound Agreement.
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 Thou to Square Link conversion formula
The relationship between square thous and square links:
To convert square thous to square links, multiply the value in square thous by 1.594225e-8. To reverse, multiply square links by 6.27264e+7.
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 Thou converter for the reverse direction.
Step-by-step: convert square thous to square links
- Write down the value in square thous (thou²).
- Multiply that value by the factor 1.594225e-8.
- The product is the equivalent value in square links (lk²).
- To reverse, multiply the square link value by 6.27264e+7.
Worked examples
Example 1 — Convert 1 thou² to lk²:
1 × 1.594225e-8 = 1.594225e-8 lk²
Example 2 — Convert 100 thou² to lk²:
100 × 1.594225e-8 = 1.594225e-6 lk²
Real-world example — From wavelengths to millimeter-scale objects
A value of one million square thous sounds vast at the atomic scale but converts to a small everyday quantity in square links — useful when relating optical-wavelength specifications to physical mounting hardware.
1000000 thou² × 1.594225e-8 = 0.0159422509 lk²
Real-world example — Sub-micron to millimeter
500,000 square thous converts to a small everyday quantity in square links — useful when relating optical-wavelength specifications to physical mounting hardware.
500000 thou² × 1.594225e-8 = 0.0079711254 lk²
Square Thou to Square Link conversion table
Standard reference values for converting square thous to square links:
| Square Thou [thou²] | Square Link [lk²] |
|---|---|
| 0.01 | 1.594225e-10 |
| 0.1 | 1.594225e-9 |
| 1 | 1.594225e-8 |
| 2 | 3.18845e-8 |
| 3 | 4.782675e-8 |
| 4 | 6.3769e-8 |
| 5 | 7.971125e-8 |
| 10 | 1.594225e-7 |
| 20 | 3.18845e-7 |
| 30 | 4.782675e-7 |
| 40 | 6.3769e-7 |
| 50 | 7.971125e-7 |
| 100 | 1.594225e-6 |
| 500 | 7.971125e-6 |
| 1000 | 1.594225e-5 |
Frequently asked questions
How many square links is 1 square thou?
How do I convert square thous to square links?
How do I convert square links back to square thous?
How many square links is 100 square thous?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 thou² = 1.594225e-8 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.