Convert Rood to Square Furlong
Convert roods to square furlongs instantly. 1 rood = 0.025 square furlong — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Furlong 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 Furlong
A square furlong is an imperial unit of area equal to exactly 40,468.564 m², or 10 acres.
Derived by squaring the furlong (660 feet or 1/8 mile). The furlong itself comes from medieval English 'furrow long', the length of a plowed furrow.
Square furlongs are rarely used today. The unit appears occasionally in historical English farming records and in some horseracing contexts (though usually as length, not area).
Medieval English origin; standardized via the 1959 International Yard and Pound Agreement.
Rood to Square Furlong conversion formula
The relationship between roods and square furlongs:
To convert roods to square furlongs, multiply the value in roods by 0.025. To reverse, multiply square furlongs by 40.
How to use this converter
Type a value into the calculator. The result in square furlongs 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 Furlong to Rood converter for the reverse direction.
Step-by-step: convert roods to square furlongs
- Write down the value in roods (rood).
- Multiply that value by the factor 0.025.
- The product is the equivalent value in square furlongs (fur²).
- To reverse, multiply the square furlong value by 40.
Worked examples
Example 1 — Convert 1 rood to fur²:
1 × 0.025 = 0.025 fur²
Example 2 — Convert 100 rood to fur²:
100 × 0.025 = 2.5 fur²
Real-world example — Road-sign distances across systems
A 100-rood road sign converts cleanly into square furlongs — exactly the conversion drivers planning trips abroad rely on when reading road signs in a different measurement system.
100 rood × 0.025 = 2.5 fur²
Real-world example — Endurance race distances
A 50-rood cycling or running race converts to a recognizable distance in square furlongs. Endurance athletes coming from a different measurement system use this conversion to compare training plans across regions.
50 rood × 0.025 = 1.25 fur²
Real-world example — Maritime exclusion zone
A 200-rood exclusion zone (a common maritime boundary) converts to a different value in square furlongs that's useful when describing the same zone in everyday land-distance units.
200 rood × 0.025 = 5 fur²
Rood to Square Furlong conversion table
Standard reference values for converting roods to square furlongs:
| Rood [rood] | Square Furlong [fur²] |
|---|---|
| 0.01 | 0.00025 |
| 0.1 | 0.0025 |
| 1 | 0.025 |
| 2 | 0.05 |
| 3 | 0.075 |
| 4 | 0.1 |
| 5 | 0.125 |
| 10 | 0.25 |
| 20 | 0.5 |
| 30 | 0.75 |
| 40 | 1 |
| 50 | 1.25 |
| 100 | 2.5 |
| 500 | 12.5 |
| 1000 | 25 |
Frequently asked questions
How many square furlongs is 1 rood?
How do I convert roods to square furlongs?
How do I convert square furlongs back to roods?
How many square furlongs 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 = 0.025 fur²) 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.