Convert Square Link to Square Perch
Convert square links to square perches instantly. 1 square link = 0.0016 square perch — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Perch 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 Perch
A square perch is identical to a square rod, equal to approximately 25.293 m². 'Perch' is the older English regional name for the same unit.
Identical in value to square rod and square pole; differs only in regional naming preference. 'Perch' is more commonly used in British and Irish historical contexts.
Square perches survive in some historical British property records, particularly in Ireland where the unit had legal status until the metric transition.
Standardized via the 1959 International Yard and Pound Agreement.
Square Link to Square Perch conversion formula
The relationship between square links and square perches:
To convert square links to square perches, multiply the value in square links by 0.0016. To reverse, multiply square perches by 625.0000034595.
How to use this converter
Type a value into the calculator. The result in square perches 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 Perch to Square Link converter for the reverse direction.
Step-by-step: convert square links to square perches
- Write down the value in square links (lk²).
- Multiply that value by the factor 0.0016.
- The product is the equivalent value in square perches (perch²).
- To reverse, multiply the square perch value by 625.0000034595.
Worked examples
Example 1 — Convert 1 lk² to perch²:
1 × 0.0016 = 0.0016 perch²
Example 2 — Convert 100 lk² to perch²:
100 × 0.0016 = 0.1599999991 perch²
Real-world example — Hardware-scale dimensions
A 10-square link fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between square links and square perches daily when mixing metric and imperial tools.
10 lk² × 0.0016 = 0.0159999999 perch²
Real-world example — Postcard and small-object dimensions
A postcard is about 5 square links wide. Converting to square perches is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 lk² × 0.0016 = 0.008 perch²
Real-world example — Ruler-scale measurements
A 30-square link school ruler converts cleanly to square perches — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 lk² × 0.0016 = 0.0479999997 perch²
Square Link to Square Perch conversion table
Standard reference values for converting square links to square perches:
| Square Link [lk²] | Square Perch [perch²] |
|---|---|
| 0.01 | 1.6e-5 |
| 0.1 | 0.00016 |
| 1 | 0.0016 |
| 2 | 0.0032 |
| 3 | 0.0048 |
| 4 | 0.0064 |
| 5 | 0.008 |
| 10 | 0.0159999999 |
| 20 | 0.0319999998 |
| 30 | 0.0479999997 |
| 40 | 0.0639999996 |
| 50 | 0.0799999996 |
| 100 | 0.1599999991 |
| 500 | 0.7999999956 |
| 1000 | 1.5999999911 |
Frequently asked questions
How many square perches is 1 square link?
How do I convert square links to square perches?
How do I convert square perches back to square links?
How many square perches 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 = 0.0016 perch²) 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.