Fathoms to Miles
An instant fathoms-to-miles converter, with the formula and a reference table below.
| Fathoms | Miles |
|---|---|
| 1 ftm | 0.001136 mi |
| 2 ftm | 0.002273 mi |
| 3 ftm | 0.003409 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 |
How to use
- Enter a value in the Fathoms field.
- The Miles figure appears immediately — no button to press.
- Typing in the Miles field converts back to Fathoms the same way.
- Use the reference table for the values that come up most often.
Fathoms to Miles formula
The factor from fathoms to miles is 0.00113636364.
mi = ftm × 0.00113636364
Put another way, one fathom is exactly 1/880 of a mile.
Why this factor: the fathom and the mile are both defined against the meter, so dividing one definition by the other gives 0.00113636364 directly. Both definitions are set out in full below.
To go the other way, divide by 0.00113636364 — or use the Miles to Fathoms converter, which is the same calculation reversed.
Worked example
Start with 12 ftm. Multiply by 0.00113636364 to get 0.013636 mi.
12 ftm × 0.00113636364 = 0.013636 mi
The converter above does this for any value you type, in either direction.
What is a fathom?
A fathom is six feet, the traditional unit for water depth.
Definition: Six international feet, so exactly 1.8288 meters.
Where it is used: Nautical charts, depth soundings, and anchor and cable lengths.
What is a mile?
The statute mile is the standard long-distance unit in the United States and the United Kingdom.
Definition: Defined as 5,280 feet, which since the 1959 International Yard and Pound Agreement makes it exactly 1,609.344 meters.
Where it is used: US and UK road signs, speed limits, running races, and vehicle odometers.
Worth knowing: Distinct from the nautical mile (1,852 m), which is about 15% longer and used at sea and in the air.
Fathoms vs Miles
The fathom is a specialized unit while the mile is an imperial unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many miles are in a fathom?
One fathom equals 0.00113636364 miles.
What is the formula to convert fathoms to miles?
Multiply the number of fathoms by 0.00113636364. To reverse it, divide by 0.00113636364 instead.
How do I convert miles back to fathoms?
Divide by 0.00113636364, which is the same as multiplying by 880.
How many miles are in 10 fathoms?
10 ftm works out to 0.011364 mi.
Is there anything to watch out for with miles?
Distinct from the nautical mile (1,852 m), which is about 15% longer and used at sea and in the air.
How is the fathom defined?
Six international feet, so exactly 1.8288 meters.