Convert Fathom to Nail
Convert fathoms to nails instantly. 1 fathom = 32 nail — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Nail to Fathom converter for the reverse conversion.
Units explained
Fathom
A fathom is an Imperial unit of length equal to 6 feet or exactly 1.8288 meters. It is used almost exclusively for measuring water depth in maritime contexts.
The fathom derives from the Old English word fæthm, meaning "the embracing arms" — the distance between the fingertips of a person's outstretched arms. Standardized at 6 feet in English maritime tradition.
Fathoms are used in nautical depth charts, scuba diving, oceanography, and maritime literature. Despite metrication efforts, fathoms remain common in English-language nautical charts and recreational diving.
Old English origin (predating 1066); standardized at 6 feet by English maritime tradition; fixed at 1.8288 m exactly via the 1959 International Yard and Pound Agreement.
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.
Fathom to Nail conversion formula
The relationship between fathoms and nails:
To convert fathoms to nails, multiply the value in fathoms by 32. To reverse, multiply nails by 0.03125.
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 Fathom converter for the reverse direction.
Step-by-step: convert fathoms to nails
- Write down the value in fathoms (ftm).
- Multiply that value by the factor 32.
- The product is the equivalent value in nails (nail).
- To reverse, multiply the nail value by 0.03125.
Worked examples
Example 1 — Convert 1 ftm to nail:
1 × 32 = 32 nail
Example 2 — Convert 100 ftm to nail:
100 × 32 = 3200 nail
Real-world example — Body height conversion (reverse direction)
You measure 1.75 fathoms tall and need to fill in a gym membership form or medical record that asks for height in nails. This is the most-used everyday length conversion in metric-using countries.
1.75 ftm × 32 = 56 nail
Real-world example — Pet and accessory dimensions
A 3-fathom dog leash equals a tidy round value in nails. Pet-supply shopping frequently mixes the two units across product specifications.
3 ftm × 32 = 96 nail
Real-world example — Fabric and tailoring
One fathom of fabric converts to a value in nails commonly used for seam allowances. Garment patterns frequently switch between the two units on a single instruction sheet.
1 ftm × 32 = 32 nail
Fathom to Nail conversion table
Standard reference values for converting fathoms to nails:
| Fathom [ftm] | Nail [nail] |
|---|---|
| 0.01 | 0.32 |
| 0.1 | 3.2 |
| 1 | 32 |
| 2 | 64 |
| 3 | 96 |
| 4 | 128 |
| 5 | 160 |
| 10 | 320 |
| 20 | 640 |
| 30 | 960 |
| 40 | 1280 |
| 50 | 1600 |
| 100 | 3200 |
| 500 | 16000 |
| 1000 | 32000 |
Frequently asked questions
How many nails is 1 fathom?
How do I convert fathoms to nails?
How do I convert nails back to fathoms?
How many nails is 100 fathoms?
Popular length unit conversions
Convert Fathom to other length units
Show all Fathom conversions
Metric / SI (7 units)
Imperial / US Customary (26 units)
Nautical (1 units)
Sources & references
Conversion factor (1 ftm = 32 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.