Convert Mil to Furlong
Convert mils to furlongs instantly. 1 mil = 1.262626e-7 furlong — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Furlong to Mil converter for the reverse conversion.
Units explained
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
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 to Furlong conversion formula
The relationship between mils and furlongs:
To convert mils to furlongs, multiply the value in mils by 1.262626e-7. To reverse, multiply furlongs by 7920000.
How to use this converter
Type a value into the calculator. The result in 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 Furlong to Mil converter for the reverse direction.
Step-by-step: convert mils to furlongs
- Write down the value in mils (mil).
- Multiply that value by the factor 1.262626e-7.
- The product is the equivalent value in furlongs (fur).
- To reverse, multiply the furlong value by 7920000.
Worked examples
Example 1 — Convert 1 mil to fur:
1 × 1.262626e-7 = 1.262626e-7 fur
Example 2 — Convert 100 mil to fur:
100 × 1.262626e-7 = 1.262626e-5 fur
Real-world example — Hair-width scale measurements
A 70-mil measurement (about the diameter of a human hair) is the kind of value materials engineers regularly express in adjacent micro-scale units like furlongs for direct comparison across supplier datasheets.
70 mil × 1.262626e-7 = 8.838384e-6 fur
Real-world example — Paper and film thicknesses
At the thickness of office paper (roughly 3 mils), converting between sub-millimeter units is routine for packaging and printing buyers comparing quotes from metric and US suppliers.
3 mil × 1.262626e-7 = 3.787879e-7 fur
Real-world example — Plastic-film thickness alternates
A 150-mil plastic film converts cleanly to furlongs — useful for packaging buyers reconciling supplier datasheets across metric and US measurement systems.
150 mil × 1.262626e-7 = 1.893939e-5 fur
Mil to Furlong conversion table
Standard reference values for converting mils to furlongs:
| Mil [mil] | Furlong [fur] |
|---|---|
| 0.01 | 1.262626e-9 |
| 0.1 | 1.262626e-8 |
| 1 | 1.262626e-7 |
| 2 | 2.525253e-7 |
| 3 | 3.787879e-7 |
| 4 | 5.050505e-7 |
| 5 | 6.313131e-7 |
| 10 | 1.262626e-6 |
| 20 | 2.525253e-6 |
| 30 | 3.787879e-6 |
| 40 | 5.050505e-6 |
| 50 | 6.313131e-6 |
| 100 | 1.262626e-5 |
| 500 | 6.313131e-5 |
| 1000 | 0.0001262626 |
Frequently asked questions
How many furlongs is 1 mil?
How do I convert mils to furlongs?
How do I convert furlongs back to mils?
How many furlongs is 100 mils?
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Metric / SI (7 units)
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Sources & references
Conversion factor (1 mil = 1.262626e-7 fur) 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.