Convert Fathom to Hand
Convert fathoms to hands instantly. 1 fathom = 18 hand — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Hand 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.
Hand
A hand is an Imperial unit of length equal to 4 inches (101.6 mm). It is used primarily to measure the height of horses at the withers.
The hand derives from the average breadth of a human hand and was standardised at exactly 4 inches by the Statute of Henry VIII in 1541.
Hands are used worldwide for horse height specification (the typical riding horse is 14–17 hh). Also used in some equestrian-adjacent contexts. The unit is now almost exclusively a horse-measurement convention.
Standardised at 4 inches by Henry VIII in 1541; value became exact in 1959 when the inch was fixed at 25.4 mm.
Fathom to Hand conversion formula
The relationship between fathoms and hands:
To convert fathoms to hands, multiply the value in fathoms by 18. To reverse, multiply hands by 0.0555555556.
How to use this converter
Type a value into the calculator. The result in hands updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Hand to Fathom converter for the reverse direction.
Step-by-step: convert fathoms to hands
- Write down the value in fathoms (ftm).
- Multiply that value by the factor 18.
- The product is the equivalent value in hands (hh).
- To reverse, multiply the hand value by 0.0555555556.
Worked examples
Example 1 — Convert 1 ftm to hh:
1 × 18 = 18 hh
Example 2 — Convert 100 ftm to hh:
100 × 18 = 1800 hh
Real-world example — Adult height conversion
A 1.8-fathom-tall person measures a value in hands that converts the height to the unit favoured by American forms, schools, or driver's licences. This is daily routine for anyone living between metric and imperial systems.
1.8 ftm × 18 = 32.4 hh
Real-world example — Fabric purchase length
Two fathoms of fabric equals a value in hands essential for tailors and textile buyers sourcing material from international suppliers that quote in different units.
2 ftm × 18 = 36 hh
Real-world example — Maritime depth conversion
A 10-fathom sounding depth converts cleanly into hands. Recreational divers and sailors translate between the two units whenever they read legacy charts against modern depth-sounder displays.
10 ftm × 18 = 180 hh
Fathom to Hand conversion table
Standard reference values for converting fathoms to hands:
| Fathom [ftm] | Hand [hh] |
|---|---|
| 0.01 | 0.18 |
| 0.1 | 1.8 |
| 1 | 18 |
| 2 | 36 |
| 3 | 54 |
| 4 | 72 |
| 5 | 90 |
| 10 | 180 |
| 20 | 360 |
| 30 | 540 |
| 40 | 720 |
| 50 | 900 |
| 100 | 1800 |
| 500 | 9000 |
| 1000 | 18000 |
Frequently asked questions
How many hands is 1 fathom?
How do I convert fathoms to hands?
How do I convert hands back to fathoms?
How many hands 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 = 18 hh) 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.