Convert Square Link to Hectare
Convert square links to hectares instantly. 1 square link = 4.046856e-6 hectare — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hectare 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.
Hectare
A hectare is a metric unit of area equal to 10,000 square meters, or one square hectometer. It is the most widely used metric unit for land measurement worldwide.
Defined as 100 ares, equal to one square hectometer. The name was introduced in 1795 in France as part of the metric system.
Hectares are the standard unit for agricultural land measurement worldwide except in the US (which uses acres). 1 hectare equals 2.47105 acres. In India, hectares are used in modern agricultural census and land records alongside traditional regional units.
Adopted in France in 1795; standardized internationally through the SI system.
Square Link to Hectare conversion formula
The relationship between square links and hectares:
To convert square links to hectares, multiply the value in square links by 4.046856e-6. To reverse, multiply hectares by 247105.3828349333.
How to use this converter
Type a value into the calculator. The result in hectares updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Hectare to Square Link converter for the reverse direction.
Step-by-step: convert square links to hectares
- Write down the value in square links (lk²).
- Multiply that value by the factor 4.046856e-6.
- The product is the equivalent value in hectares (ha).
- To reverse, multiply the hectare value by 247105.3828349333.
Worked examples
Example 1 — Convert 1 lk² to ha:
1 × 4.046856e-6 = 4.046856e-6 ha
Example 2 — Convert 100 lk² to ha:
100 × 4.046856e-6 = 0.0004046856 ha
Real-world example — Architectural to geographic scale
A 100,000-square link measurement equals one hectare. 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 × 4.046856e-6 = 0.40468564 ha
Real-world example — Small to geographic-scale
100,000 square links equals one hectare — a useful conversion when small-scale survey diagrams must be related to road-network distances on a different map.
100000 lk² × 4.046856e-6 = 0.40468564 ha
Square Link to Hectare conversion table
Standard reference values for converting square links to hectares:
| Square Link [lk²] | Hectare [ha] |
|---|---|
| 0.01 | 4.046856e-8 |
| 0.1 | 4.046856e-7 |
| 1 | 4.046856e-6 |
| 2 | 8.093713e-6 |
| 3 | 1.214057e-5 |
| 4 | 1.618743e-5 |
| 5 | 2.023428e-5 |
| 10 | 4.046856e-5 |
| 20 | 8.093713e-5 |
| 30 | 0.0001214057 |
| 40 | 0.0001618743 |
| 50 | 0.0002023428 |
| 100 | 0.0004046856 |
| 500 | 0.0020234282 |
| 1000 | 0.0040468564 |
Frequently asked questions
How many hectares is 1 square link?
How do I convert square links to hectares?
How do I convert hectares back to square links?
How many hectares 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 = 4.046856e-6 ha) 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.