Convert Nail to Kilometer
Convert nails to kilometers instantly. 1 nail = 5.715e-5 kilometer — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Kilometer 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.
Kilometer
A kilometer is a metric unit of length equal to one thousand meters. It is the standard unit for measuring road distances, geographic distances, and other large-scale measurements in metric countries.
The kilometer was defined alongside the meter in 1795 using the standard SI prefix kilo- (from Greek chilioi, "thousand"), denoting one thousand units.
Kilometers are used worldwide (except the United States and a few others) for road signage, geographic distance, athletic events, and scientific distances at planetary scale. Speed limits in most countries are given in km/h.
Adopted 1795 in France as part of the original metric system; the kilometer became the global standard for road and geographic distance through the 19th and 20th century metric adoption.
Nail to Kilometer conversion formula
The relationship between nails and kilometers:
To convert nails to kilometers, multiply the value in nails by 5.715e-5. To reverse, multiply kilometers by 17497.8127734033.
How to use this converter
Type a value into the calculator. The result in kilometers updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Kilometer to Nail converter for the reverse direction.
Step-by-step: convert nails to kilometers
- Write down the value in nails (nail).
- Multiply that value by the factor 5.715e-5.
- The product is the equivalent value in kilometers (km).
- To reverse, multiply the kilometer value by 17497.8127734033.
Worked examples
Example 1 — Convert 1 nail to km:
1 × 5.715e-5 = 5.715e-5 km
Example 2 — Convert 100 nail to km:
100 × 5.715e-5 = 0.005715 km
Real-world example — Small to geographic-scale
100,000 nails equals one kilometer — a useful conversion when small-scale survey diagrams must be related to road-network distances on a different map.
100000 nail × 5.715e-5 = 5.715 km
Real-world example — Architectural to geographic scale
A 100,000-nail measurement equals one kilometer. The five-order-of-magnitude scale change comes up in mapping work where architectural site plans must be related to road-network maps.
100000 nail × 5.715e-5 = 5.715 km
Nail to Kilometer conversion table
Standard reference values for converting nails to kilometers:
| Nail [nail] | Kilometer [km] |
|---|---|
| 0.01 | 5.715e-7 |
| 0.1 | 5.715e-6 |
| 1 | 5.715e-5 |
| 2 | 0.0001143 |
| 3 | 0.00017145 |
| 4 | 0.0002286 |
| 5 | 0.00028575 |
| 10 | 0.0005715 |
| 20 | 0.001143 |
| 30 | 0.0017145 |
| 40 | 0.002286 |
| 50 | 0.0028575 |
| 100 | 0.005715 |
| 500 | 0.028575 |
| 1000 | 0.05715 |
Frequently asked questions
How many kilometers is 1 nail?
How do I convert nails to kilometers?
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How many kilometers is 100 nails?
Popular length unit conversions
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 nail = 5.715e-5 km) 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.