Convert Nail to Furlong
Convert nails to furlongs instantly. 1 nail = 0.0002840909 furlong — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Furlong to Nail converter for the reverse conversion.
Units explained
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
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 to Furlong conversion formula
The relationship between nails and furlongs:
To convert nails to furlongs, multiply the value in nails by 0.0002840909. To reverse, multiply furlongs by 3520.
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 Nail converter for the reverse direction.
Step-by-step: convert nails to furlongs
- Write down the value in nails (nail).
- Multiply that value by the factor 0.0002840909.
- The product is the equivalent value in furlongs (fur).
- To reverse, multiply the furlong value by 3520.
Worked examples
Example 1 — Convert 1 nail to fur:
1 × 0.0002840909 = 0.0002840909 fur
Example 2 — Convert 100 nail to fur:
100 × 0.0002840909 = 0.0284090909 fur
Real-world example — Hardware-scale dimensions
A 10-nail fastener or component is about as long as a thumbnail. Mechanics and DIY enthusiasts convert between nails and furlongs daily when mixing metric and imperial tools.
10 nail × 0.0002840909 = 0.0028409091 fur
Real-world example — Postcard and small-object dimensions
A postcard is about 5 nails wide. Converting to furlongs is essential for international postal addressing forms that ask for dimensions in different units across countries.
5 nail × 0.0002840909 = 0.0014204545 fur
Real-world example — Ruler-scale measurements
A 30-nail school ruler converts cleanly to furlongs — useful when buying a desk accessory from a retailer whose product specs use a different unit.
30 nail × 0.0002840909 = 0.0085227273 fur
Nail to Furlong conversion table
Standard reference values for converting nails to furlongs:
| Nail [nail] | Furlong [fur] |
|---|---|
| 0.01 | 2.840909e-6 |
| 0.1 | 2.840909e-5 |
| 1 | 0.0002840909 |
| 2 | 0.0005681818 |
| 3 | 0.0008522727 |
| 4 | 0.0011363636 |
| 5 | 0.0014204545 |
| 10 | 0.0028409091 |
| 20 | 0.0056818182 |
| 30 | 0.0085227273 |
| 40 | 0.0113636364 |
| 50 | 0.0142045455 |
| 100 | 0.0284090909 |
| 500 | 0.1420454545 |
| 1000 | 0.2840909091 |
Frequently asked questions
How many furlongs is 1 nail?
How do I convert nails to furlongs?
How do I convert furlongs back to nails?
How many furlongs is 100 nails?
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 nail = 0.0002840909 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.