Convert Furlong to League
Convert furlongs to leagues instantly. 1 furlong = 0.0416666667 league — use the live calculator, the exact formula, a conversion table and worked examples. Also check the League to Furlong converter for the reverse conversion.
Units explained
Furlong
A furlong is an Imperial unit of length equal to 660 feet, or exactly one eighth of a mile (about 201.17 m). It is the longest unit in the traditional English farm-and-survey system.
The furlong derives from Old English furh (furrow) + lang (long) — originally the length of a furrow in a typical medieval English open field. Standardised at 660 feet (= 10 chains = 220 yards = 1/8 mile) in medieval times.
Furlongs are the standard distance unit in horse racing (e.g., 'The race is 8 furlongs'), historical English farming and surveying, and occasional poetic or rhetorical usage. Modern racing courses worldwide list distances in furlongs.
Medieval English farming origin; standardised at 660 feet; remains the official distance unit in flat-racing thoroughbred horse races worldwide.
League
A league is an Imperial unit of length equal to 3 miles (about 4.83 km). It is one of the oldest distance units in English usage, historically representing the distance a person could walk in one hour.
The English league derives from the ancient Roman leuga via medieval English customary practice. Standardised at 3 statute miles in English law.
Leagues appear in historical English literature ('seven-league boots'), maritime navigation (a nautical league is 3 nautical miles), and traditional distance descriptions. Modern usage is largely literary.
Medieval English customary origin; standardised at 3 miles; became exact via the 1959 International Yard and Pound Agreement.
Furlong to League conversion formula
The relationship between furlongs and leagues:
To convert furlongs to leagues, multiply the value in furlongs by 0.0416666667. To reverse, multiply leagues by 24.
How to use this converter
Type a value into the calculator. The result in leagues updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the League to Furlong converter for the reverse direction.
Step-by-step: convert furlongs to leagues
- Write down the value in furlongs (fur).
- Multiply that value by the factor 0.0416666667.
- The product is the equivalent value in leagues (lea).
- To reverse, multiply the league value by 24.
Worked examples
Example 1 — Convert 1 fur to lea:
1 × 0.0416666667 = 0.0416666667 lea
Example 2 — Convert 100 fur to lea:
100 × 0.0416666667 = 4.1666666667 lea
Furlong to League conversion table
Standard reference values for converting furlongs to leagues:
| Furlong [fur] | League [lea] |
|---|---|
| 0.01 | 0.0004166667 |
| 0.1 | 0.0041666667 |
| 1 | 0.0416666667 |
| 2 | 0.0833333333 |
| 3 | 0.125 |
| 4 | 0.1666666667 |
| 5 | 0.2083333333 |
| 10 | 0.4166666667 |
| 20 | 0.8333333333 |
| 30 | 1.25 |
| 40 | 1.6666666667 |
| 50 | 2.0833333333 |
| 100 | 4.1666666667 |
| 500 | 20.8333333333 |
| 1000 | 41.6666666667 |
Frequently asked questions
How many leagues is 1 furlong?
How do I convert furlongs to leagues?
How do I convert leagues back to furlongs?
How many leagues is 100 furlongs?
Popular length unit conversions
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 fur = 0.0416666667 lea) 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.