Convert Nail to Ell
Convert nails to ells instantly. 1 nail = 0.05 ell — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Ell 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.
Ell
An ell is an Imperial unit of length equal to 45 inches (1.143 m), historically used as the standard measure of cloth in English commerce.
The ell derives from old English elna (forearm) and was standardised in medieval English trade as the cloth-measuring yard equivalent. The English ell is 45 inches; other regional ells differed.
Ells appear in historical English commerce records (especially cloth and tapestry trade). Used in legal documents through the 19th century; rare in modern commerce but referenced in literary and historical contexts.
Medieval English cloth-trade origin; standardised at 45 inches; became exact via the 1959 International Yard and Pound Agreement.
Nail to Ell conversion formula
The relationship between nails and ells:
To convert nails to ells, multiply the value in nails by 0.05. To reverse, multiply ells by 20.
How to use this converter
Type a value into the calculator. The result in ells updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Ell to Nail converter for the reverse direction.
Step-by-step: convert nails to ells
- Write down the value in nails (nail).
- Multiply that value by the factor 0.05.
- The product is the equivalent value in ells (ell).
- To reverse, multiply the ell value by 20.
Worked examples
Example 1 — Convert 1 nail to ell:
1 × 0.05 = 0.05 ell
Example 2 — Convert 100 nail to ell:
100 × 0.05 = 5 ell
Real-world example — Children's height milestones
A 150-nail-tall child measures a value in ells that's commonly used for theme-park ride height requirements when travelling between countries that use different measurement units.
150 nail × 0.05 = 7.5 ell
Real-world example — Body height conversion
You enter your height as 180 nails into an international job or visa application. The form then asks for the same value in ells — converting between these adjacent units is one of the most-used length conversions globally.
180 nail × 0.05 = 9 ell
Real-world example — Furniture and large objects
A 72-nail piece of furniture converts to a value in ells that's easier to mentally compare with room dimensions. This is the typical workflow when shopping internationally and product specs use a different unit than your room measurements.
72 nail × 0.05 = 3.6 ell
Nail to Ell conversion table
Standard reference values for converting nails to ells:
| Nail [nail] | Ell [ell] |
|---|---|
| 0.01 | 0.0005 |
| 0.1 | 0.005 |
| 1 | 0.05 |
| 2 | 0.1 |
| 3 | 0.15 |
| 4 | 0.2 |
| 5 | 0.25 |
| 10 | 0.5 |
| 20 | 1 |
| 30 | 1.5 |
| 40 | 2 |
| 50 | 2.5 |
| 100 | 5 |
| 500 | 25 |
| 1000 | 50 |
Frequently asked questions
How many ells is 1 nail?
How do I convert nails to ells?
How do I convert ells back to nails?
How many ells is 100 nails?
Popular length unit conversions
Convert Nail to other length units
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Metric / SI (4 units)
Imperial / US Customary (26 units)
Sources & references
Conversion factor (1 nail = 0.05 ell) 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.