Feet to fathoms
Type a value in feet to see it in fathoms straight away, or type in the second box to convert back.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Type the value in the feet box.
- Read the result in fathoms as you type, and pick the precision you need.
- Swap the direction to convert back, or copy the result.
How it is calculated
ftm = ft × 0.1666666667
Multiply the value in feet by 0.1666666667 to get fathoms.
Example
To convert 25 ft to fathoms: 25 × 0.1666666667 = 4.16667 ftm.
Conversion table
| Feet (ft) | Fathoms (ftm) |
|---|---|
| 1 | 0.166667 |
| 2 | 0.333333 |
| 3 | 0.5 |
| 5 | 0.833333 |
| 10 | 1.66667 |
| 20 | 3.33333 |
| 25 | 4.16667 |
| 50 | 8.33333 |
| 100 | 16.6667 |
| 250 | 41.6667 |
| 500 | 83.3333 |
| 1,000 | 166.667 |
About the units
- Foot
- The international foot is 12 inches, exactly 0.3048 meter, used for height, altitude and building sizes.
- Fathom
- A fathom is 6 feet, exactly 1.8288 meters, traditionally used for water depth.
Limits and caveats
- Results are rounded for display and computed with the browser's floating point precision (about 15 significant digits).
- Both unit factors are exact by their official definitions.
Questions about this tool
How many fathoms are in one foot?
1 ft = 0.166667 ftm exactly.
How do I convert feet to fathoms?
Use ftm = ft × 0.1666666667. For example, 25 ft = 4.16667 ftm.
How many feet are in one fathom?
1 ftm = 6 ft.
Are the inch, foot and mile factors exact or rounded?
They are exact by definition. Since the 1959 agreement one inch is exactly 2.54 cm, one foot 0.3048 m and one mile 1609.344 m.
What is the difference between a mile and a nautical mile?
A statute mile is 1609.344 meters and is used on roads. A nautical mile is 1852 meters and is used at sea and in aviation.