How to convert feet (US survey) to fathoms
1 foot (us survey) is equal to 0.166667 fathoms, and 1 fathom is equal to 5.999988 feet (US survey). To convert, multiply by the conversion factor:
fathoms = feet (US survey) × 0.166667
fathoms = feet (US survey) ÷ 5.999988Example: convert 15 ft (US) to ftm: 15 × 0.166667 = 2.500005 ftm.
Foot (US Survey) to Fathom conversion table
| Foot (US Survey) (ft (US)) | Fathom (ftm) |
|---|---|
| 0.01 ft (US) | 0.00166667 ftm |
| 0.1 ft (US) | 0.0166667 ftm |
| 1 ft (US) | 0.166667 ftm |
| 2 ft (US) | 0.333334 ftm |
| 3 ft (US) | 0.500001 ftm |
| 5 ft (US) | 0.833335 ftm |
| 10 ft (US) | 1.66667 ftm |
| 20 ft (US) | 3.33334 ftm |
| 50 ft (US) | 8.33335 ftm |
| 100 ft (US) | 16.6667 ftm |
| 250 ft (US) | 41.66675 ftm |
| 500 ft (US) | 83.3335 ftm |
| 1,000 ft (US) | 166.667 ftm |
About the foot (us survey)
The US survey foot is exactly 1200/3937 m (about 0.3048006 m), two parts per million longer than the international foot. It was officially retired at the end of 2022 but remains in older land records and state plane coordinates.
Symbol: ft (US) · 1 ft (US) = 0.3048006096 m · Category: US survey units
About the fathom
The fathom is 6 feet (1.8288 m). It's used to measure the depth of water on nautical charts and fishing lines.
Symbol: ftm · 1 ftm = 1.8288 m · Category: Imperial & US customary