Miles to Fathoms
Convert miles to fathoms instantly. 1 mi = 880 ftm. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert miles to fathoms
To convert miles to fathoms, multiply by 880. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
ftm = mi × 880
Miles to Fathoms conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Miles | Fathoms |
|---|---|
| 1 mi | 880 ftm |
| 2 mi | 1,760 ftm |
| 3 mi | 2,640 ftm |
| 5 mi | 4,400 ftm |
| 10 mi | 8,800 ftm |
| 20 mi | 17,600 ftm |
| 25 mi | 22,000 ftm |
| 50 mi | 44,000 ftm |
| 100 mi | 88,000 ftm |
| 500 mi | 440,000 ftm |
| 1,000 mi | 880,000 ftm |
What is a mile?
1,760 yards. The statute mile used on US and UK roads.
What is a fathom?
Six feet. The traditional unit for water depth on nautical charts.
The formula
ftm = mi × 880
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Miles to Fathoms
- Type the number of miles you want to convert.
- Read the result in fathoms straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked fathoms to miles page.
Miles to Fathoms — frequently asked questions
How many fathoms are in a mile?
One mile equals 880 ftm. ftm = mi × 880
What is the formula to convert miles to fathoms?
The formula is ftm = mi × 880. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert fathoms back to miles?
Divide instead of multiplying: one fathom is 0.0011363636 mi. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this miles to fathoms free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the miles to fathoms.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 15, 2026 · Calculation runs client-side · No data collected · Report an error