Convert Furlong to Mil
Convert furlongs to mils instantly. 1 furlong = 7920000 mil — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Mil 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.
Mil
A mil (also called a thou) is an Imperial unit of length equal to one thousandth of an inch (1/1000 in = 0.0254 mm = 25.4 μm exactly). It is used in engineering, manufacturing, and materials specifications.
The mil is derived from the Latin mille, "thousand," denoting one-thousandth of an inch. Standardized in industrial use during the 19th-century rise of precision engineering.
Mils are used to specify thicknesses of plastic films, foils, paper, copper traces on printed circuit boards (PCBs), wire insulation, and paint coatings. A standard sheet of paper is about 4 mils thick.
Adopted in 19th-century engineering practice; the value (1/1000 in) became exact in 1959 when the inch was fixed at 25.4 mm via the International Yard and Pound Agreement. The British term is "thou"; American term is "mil".
Furlong to Mil conversion formula
The relationship between furlongs and mils:
To convert furlongs to mils, multiply the value in furlongs by 7920000. To reverse, multiply mils by 1.262626e-7.
How to use this converter
Type a value into the calculator. The result in mils updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Mil to Furlong converter for the reverse direction.
Step-by-step: convert furlongs to mils
- Write down the value in furlongs (fur).
- Multiply that value by the factor 7920000.
- The product is the equivalent value in mils (mil).
- To reverse, multiply the mil value by 1.262626e-7.
Worked examples
Example 1 — Convert 1 fur to mil:
1 × 7920000 = 7920000 mil
Example 2 — Convert 100 fur to mil:
100 × 7920000 = 7.92e+8 mil
Furlong to Mil conversion table
Standard reference values for converting furlongs to mils:
| Furlong [fur] | Mil [mil] |
|---|---|
| 0.01 | 79200 |
| 0.1 | 792000 |
| 1 | 7920000 |
| 2 | 1.584e+7 |
| 3 | 2.376e+7 |
| 4 | 3.168e+7 |
| 5 | 3.96e+7 |
| 10 | 7.92e+7 |
| 20 | 1.584e+8 |
| 30 | 2.376e+8 |
| 40 | 3.168e+8 |
| 50 | 3.96e+8 |
| 100 | 7.92e+8 |
| 500 | 3.96e+9 |
| 1000 | 7.92e+9 |
Frequently asked questions
How many mils is 1 furlong?
How do I convert furlongs to mils?
How do I convert mils back to furlongs?
How many mils 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 = 7920000 mil) 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.