Convert Square Link to Acre
Convert square links to acres instantly. 1 square link = 1e-5 acre — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Acre 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.
Acre
An acre is an imperial unit of area equal to exactly 4046.8564224 m². It is the most widely used non-metric unit for land area, particularly in the US, UK, and India.
Originally defined in medieval England as the area one yoke of oxen could plow in a day, approximately 40 perches by 4 perches. Standardized via the 1959 International Yard and Pound Agreement.
Acres are the standard land measurement unit in the US (real estate, agriculture), the UK (rural property), and widely used in India (alongside hectares and traditional regional units). 1 acre = 4840 sq yd = 43,560 sq ft = 0.4047 hectare.
Medieval English farming origin; modern exact value standardized in 1959.
Square Link to Acre conversion formula
The relationship between square links and acres:
To convert square links to acres, multiply the value in square links by 1e-5. To reverse, multiply acres by 100000.0005535161.
How to use this converter
Type a value into the calculator. The result in acres updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Acre to Square Link converter for the reverse direction.
Step-by-step: convert square links to acres
- Write down the value in square links (lk²).
- Multiply that value by the factor 1e-5.
- The product is the equivalent value in acres (ac).
- To reverse, multiply the acre value by 100000.0005535161.
Worked examples
Example 1 — Convert 1 lk² to ac:
1 × 1e-5 = 1e-5 ac
Example 2 — Convert 100 lk² to ac:
100 × 1e-5 = 0.001 ac
Real-world example — Architectural to geographic scale
A 100,000-square link measurement equals one acre. The five-order-of-magnitude scale change comes up in mapping work where architectural site plans must be related to road-network maps.
100000 lk² × 1e-5 = 0.9999999945 ac
Real-world example — Small to geographic-scale
100,000 square links equals one acre — a useful conversion when small-scale survey diagrams must be related to road-network distances on a different map.
100000 lk² × 1e-5 = 0.9999999945 ac
Square Link to Acre conversion table
Standard reference values for converting square links to acres:
| Square Link [lk²] | Acre [ac] |
|---|---|
| 0.01 | 1e-7 |
| 0.1 | 1e-6 |
| 1 | 1e-5 |
| 2 | 2e-5 |
| 3 | 3e-5 |
| 4 | 4e-5 |
| 5 | 5e-5 |
| 10 | 1e-4 |
| 20 | 0.0002 |
| 30 | 0.0003 |
| 40 | 0.0004 |
| 50 | 0.0005 |
| 100 | 0.001 |
| 500 | 0.005 |
| 1000 | 0.0099999999 |
Frequently asked questions
How many acres is 1 square link?
How do I convert square links to acres?
How do I convert acres back to square links?
How many acres is 100 square links?
Popular area unit conversions
Convert Square Link to other area units
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 lk² = 1e-5 ac) 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.