Convert Furlong to Nail
Convert furlongs to nails instantly. 1 furlong = 3520 nail — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Nail 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.
Nail
A nail is an Imperial unit of length equal to 2.25 inches (about 57.15 mm). It was historically used in the English cloth trade.
The nail derives from an English cloth-measure tradition dating to medieval times. Standardised at 2.25 inches (or 1/16 of a yard) through English customary practice and ratified by the 1959 International Yard and Pound Agreement.
Nails were historically used to measure cloth, particularly small pieces and ribbons. Rare in modern commerce but appears in historical textile literature and reproduction crafts.
Medieval English cloth-trade origin; standardised at 1/16 yard; fixed exactly at 0.05715 m via the 1959 International Yard and Pound Agreement.
Furlong to Nail conversion formula
The relationship between furlongs and nails:
To convert furlongs to nails, multiply the value in furlongs by 3520. To reverse, multiply nails by 0.0002840909.
How to use this converter
Type a value into the calculator. The result in nails updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Nail to Furlong converter for the reverse direction.
Step-by-step: convert furlongs to nails
- Write down the value in furlongs (fur).
- Multiply that value by the factor 3520.
- The product is the equivalent value in nails (nail).
- To reverse, multiply the nail value by 0.0002840909.
Worked examples
Example 1 — Convert 1 fur to nail:
1 × 3520 = 3520 nail
Example 2 — Convert 100 fur to nail:
100 × 3520 = 352000 nail
Furlong to Nail conversion table
Standard reference values for converting furlongs to nails:
| Furlong [fur] | Nail [nail] |
|---|---|
| 0.01 | 35.2 |
| 0.1 | 352 |
| 1 | 3520 |
| 2 | 7040 |
| 3 | 10560 |
| 4 | 14080 |
| 5 | 17600 |
| 10 | 35200 |
| 20 | 70400 |
| 30 | 105600 |
| 40 | 140800 |
| 50 | 176000 |
| 100 | 352000 |
| 500 | 1760000 |
| 1000 | 3520000 |
Frequently asked questions
How many nails is 1 furlong?
How do I convert furlongs to nails?
How do I convert nails back to furlongs?
How many nails 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 = 3520 nail) 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.