Convert Fathom to Mile (ftm → mi)
The fathom is the traditional marine depth unit, equal to six feet, used in nautical charts and diving manuals.
Fathom to Mile Conversion Table
10 common values| Fathom | Mile |
|---|---|
| 1 ftm | 0.001136 mi |
| 5 ftm | 0.005682 mi |
| 10 ftm | 0.011364 mi |
| 25 ftm | 0.028409 mi |
| 50 ftm | 0.056818 mi |
| 100 ftm | 0.113636 mi |
| 250 ftm | 0.284091 mi |
| 500 ftm | 0.568182 mi |
| 1,000 ftm | 1.136364 mi |
| 5,000 ftm | 5.681818 mi |
How to Convert Fathom to Mile Manually
Step by StepConverting fathoms to miles is straightforward: multiply by the conversion factor. Follow these three steps to do it by hand or in your head.
- 1Take your value in fathomsStart with the number of fathoms (ftm) you want to convert.
- 2Multiply by 0.001136The conversion factor from ftm to mi is 0.001136. Multiply your value by this number.
- 3Read the result in milesThe result is your value in miles (mi).
Formula
Multiply the value in fathoms by 0.001136. For the reverse direction, multiply by 880.
mi = ftm × 0.001136ftm = mi × 880Tips
Use these in everyday conversions- 1 fathom = 2 yards = 6 feet = 1.8288 m.
- Modern charts use metres internationally; fathoms are mostly historical.
- The word "fathom" comes from Old English for "outstretched arms" — originally the span of an adult's arms.
Common Mistakes
Avoid these- Reading a modern chart that uses metres as if it were fathoms — a factor-of-1.83 depth error.
- Confusing fathoms with feet on mixed-unit charts.
- Assuming all US charts still use fathoms — NOAA has largely migrated to metres.
About Fathom and Mile
What is the Fathom?
The fathom equals exactly 1.8288 meters or 6 feet and is the traditional marine depth unit. The word derives from the Old English 'fæðm,' meaning the span of outstretched arms — historically the distance a sailor could measure rope by stretching it from fingertip to fingertip. Used since antiquity for sounding water depth (lowering a weighted line and counting fathom marks), the fathom remains common in nautical charts, diving manuals, and marine literature. Famous from Mark Twain's pen name (a riverboat lead's call meaning 'safe water,' 2 fathoms or 12 feet) and Shakespeare's 'full fathom five,' the unit retains cultural resonance. Modern oceanographic science prefers the meter, but the fathom persists in fishing, recreational diving, and historical maritime contexts. The fathom relates to the foot (1 fathom = 6 ft) and the yard (1 fathom = 2 yd).
- Water depth on older US nautical charts
- Maritime literature and historical navigation
- Sport diving and scuba depth references in the US
A "mark twain" reading — made famous by the Mississippi riverboats — meant 2 fathoms (3.66 m) of water, the minimum safe depth.
What is the Mile?
The statute mile equals exactly 1,609.344 meters since the international yard agreement of 1959. The unit traces back to the Roman 'mille passuum' (one thousand paces), each pace being roughly 5 Roman feet, giving 5,000 Roman feet. The modern mile evolved through medieval England, where it was standardized to 5,280 feet by Queen Elizabeth I in 1593. Today it remains the official road-distance unit in the United States, the United Kingdom, and Myanmar. American and British road signs, car speedometers, and athletic tracks (the famous 1-mile run) all use the mile. Distinct from the nautical mile (1,852 m), the statute mile is sometimes called the 'land mile.' London to Edinburgh by road is about 400 miles, and a marathon is exactly 26.22 miles.
- US and UK motorway distances and speed limits
- Car odometers in American and British vehicles
- Track events (mile run, quarter-mile drag racing)
London to Edinburgh is about 400 miles by road. A marathon is 26.22 miles. US highways typically post 65–75 mph speed limits.