Convert Furlong to Millimeter
Convert furlongs to millimeters instantly. 1 furlong = 201168 millimeter — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Millimeter 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.
Millimeter
A millimeter is a metric unit of length equal to one thousandth of a meter (1/1000 m). It is the standard small-scale unit in the SI system and is widely used wherever sub-centimeter precision matters.
The millimeter was defined alongside the meter when France adopted the metric system in 1795, using the standard SI prefix milli- (from Latin mille, "thousand") to denote one-thousandth.
Millimeters are used in engineering drawings, machining, manufacturing, paper sizes, rainfall measurement, and any context where dimensions below one centimeter need to be specified clearly. Most rulers worldwide are marked in millimeters.
Adopted in 1795 in France as part of the original metric system; standardized internationally by the Metre Convention in 1875 and confirmed in the SI in 1960.
Furlong to Millimeter conversion formula
The relationship between furlongs and millimeters:
To convert furlongs to millimeters, multiply the value in furlongs by 201168. To reverse, multiply millimeters by 4.97097e-6.
How to use this converter
Type a value into the calculator. The result in millimeters updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Millimeter to Furlong converter for the reverse direction.
Step-by-step: convert furlongs to millimeters
- Write down the value in furlongs (fur).
- Multiply that value by the factor 201168.
- The product is the equivalent value in millimeters (mm).
- To reverse, multiply the millimeter value by 4.97097e-6.
Worked examples
Example 1 — Convert 1 fur to mm:
1 × 201168 = 201168 mm
Example 2 — Convert 100 fur to mm:
100 × 201168 = 2.01168e+7 mm
Furlong to Millimeter conversion table
Standard reference values for converting furlongs to millimeters:
| Furlong [fur] | Millimeter [mm] |
|---|---|
| 0.01 | 2011.68 |
| 0.1 | 20116.8 |
| 1 | 201168 |
| 2 | 402336 |
| 3 | 603504 |
| 4 | 804672 |
| 5 | 1005840 |
| 10 | 2011680 |
| 20 | 4023360 |
| 30 | 6035040 |
| 40 | 8046720 |
| 50 | 1.00584e+7 |
| 100 | 2.01168e+7 |
| 500 | 1.00584e+8 |
| 1000 | 2.01168e+8 |
Frequently asked questions
How many millimeters is 1 furlong?
How do I convert furlongs to millimeters?
How do I convert millimeters back to furlongs?
How many millimeters 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 = 201168 mm) 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.