Convert Rood to Square Link
Convert roods to square links instantly. 1 rood = 25000.000138379 square link — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Link to Rood converter for the reverse conversion.
Units explained
Rood
A rood is an imperial unit of area equal to approximately 1011.71 m², or 1/4 of an acre. It was historically used in England and parts of the British Empire.
Defined as one-quarter of an acre; historically used in medieval English farming as the area one ox could plow in a day. The word relates to 'rod' as a measure of length used in plot dimensions.
Roods appear in historical English farming records, parish records, and old property deeds. The unit is functionally obsolete today.
Medieval English farming origin; 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.
Rood to Square Link conversion formula
The relationship between roods and square links:
To convert roods to square links, multiply the value in roods by 25000.000138379. To reverse, multiply square links by 4e-5.
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 Rood converter for the reverse direction.
Step-by-step: convert roods to square links
- Write down the value in roods (rood).
- Multiply that value by the factor 25000.000138379.
- The product is the equivalent value in square links (lk²).
- To reverse, multiply the square link value by 4e-5.
Worked examples
Example 1 — Convert 1 rood to lk²:
1 × 25000.000138379 = 25000.000138379 lk²
Example 2 — Convert 100 rood to lk²:
100 × 25000.000138379 = 2500000.0138379014 lk²
Real-world example — Geographic to architectural conversion
One rood equals 100,000 square links. The conversion bridges geographic-scale survey work and architectural-scale building plans on the same drawing.
1 rood × 25000.000138379 = 25000.000138379 lk²
Real-world example — Geographic to architectural scale
One rood equals 100,000 square links. Map scales use this when an architectural site plan (in the smaller unit) must be related to road-network plans (in the larger unit) on the same drawing.
1 rood × 25000.000138379 = 25000.000138379 lk²
Rood to Square Link conversion table
Standard reference values for converting roods to square links:
| Rood [rood] | Square Link [lk²] |
|---|---|
| 0.01 | 250.0000013838 |
| 0.1 | 2500.0000138379 |
| 1 | 25000.000138379 |
| 2 | 50000.000276758 |
| 3 | 75000.000415137 |
| 4 | 100000.0005535161 |
| 5 | 125000.0006918951 |
| 10 | 250000.0013837902 |
| 20 | 500000.0027675803 |
| 30 | 750000.0041513705 |
| 40 | 1000000.0055351607 |
| 50 | 1250000.0069189507 |
| 100 | 2500000.0138379014 |
| 500 | 1.25e+7 |
| 1000 | 2.5e+7 |
Frequently asked questions
How many square links is 1 rood?
How do I convert roods to square links?
How do I convert square links back to roods?
How many square links is 100 roods?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 rood = 25000.000138379 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 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.