Convert Furlong to Fathom
Convert furlongs to fathoms instantly. 1 furlong = 110 fathom — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Fathom 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.
Fathom
A fathom is an Imperial unit of length equal to 6 feet or exactly 1.8288 meters. It is used almost exclusively for measuring water depth in maritime contexts.
The fathom derives from the Old English word fæthm, meaning "the embracing arms" — the distance between the fingertips of a person's outstretched arms. Standardized at 6 feet in English maritime tradition.
Fathoms are used in nautical depth charts, scuba diving, oceanography, and maritime literature. Despite metrication efforts, fathoms remain common in English-language nautical charts and recreational diving.
Old English origin (predating 1066); standardized at 6 feet by English maritime tradition; fixed at 1.8288 m exactly via the 1959 International Yard and Pound Agreement.
Furlong to Fathom conversion formula
The relationship between furlongs and fathoms:
To convert furlongs to fathoms, multiply the value in furlongs by 110. To reverse, multiply fathoms by 0.0090909091.
How to use this converter
Type a value into the calculator. The result in fathoms updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Fathom to Furlong converter for the reverse direction.
Step-by-step: convert furlongs to fathoms
- Write down the value in furlongs (fur).
- Multiply that value by the factor 110.
- The product is the equivalent value in fathoms (ftm).
- To reverse, multiply the fathom value by 0.0090909091.
Worked examples
Example 1 — Convert 1 fur to ftm:
1 × 110 = 110 ftm
Example 2 — Convert 100 fur to ftm:
100 × 110 = 11000 ftm
Furlong to Fathom conversion table
Standard reference values for converting furlongs to fathoms:
| Furlong [fur] | Fathom [ftm] |
|---|---|
| 0.01 | 1.1 |
| 0.1 | 11 |
| 1 | 110 |
| 2 | 220 |
| 3 | 330 |
| 4 | 440 |
| 5 | 550 |
| 10 | 1100 |
| 20 | 2200 |
| 30 | 3300 |
| 40 | 4400 |
| 50 | 5500 |
| 100 | 11000 |
| 500 | 55000 |
| 1000 | 110000 |
Frequently asked questions
How many fathoms is 1 furlong?
How do I convert furlongs to fathoms?
How do I convert fathoms back to furlongs?
How many fathoms is 100 furlongs?
Popular length unit conversions
Convert Furlong to other length units
Show all Furlong conversions
Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 fur = 110 ftm) 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.