Fathoms to Feet
An instant fathoms-to-feet converter, with the formula and a reference table below.
| Fathoms | Feet |
|---|---|
| 1 ftm | 6 ft |
| 2 ftm | 12 ft |
| 3 ftm | 18 ft |
| 5 ftm | 30 ft |
| 10 ftm | 60 ft |
| 25 ftm | 150 ft |
| 50 ftm | 300 ft |
| 100 ftm | 600 ft |
How to use
- Enter a value in the Fathoms field.
- The Feet figure appears immediately — no button to press.
- Typing in the Feet field converts back to Fathoms the same way.
- Use the reference table for the values that come up most often.
Fathoms to Feet formula
To convert fathoms to feet, multiply by 6.
ft = ftm × 6
Put another way, one fathom is exactly 6 feet.
Why this factor: the fathom and the foot are both defined against the meter, so dividing one definition by the other gives 6 directly. Both definitions are set out in full below.
To go the other way, divide by 6 — or use the Feet to Fathoms converter, which is the same calculation reversed.
Worked example
Given 100 ftm, multiplying by 6 yields 600 ft.
100 ftm × 6 = 600 ft
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 foot?
A foot is twelve inches, the primary unit for human-scale dimensions in the US.
Definition: Exactly 0.3048 meter since 1959 — one third of the international yard.
Where it is used: Building heights, room dimensions, aviation altitude worldwide, and personal height in the US and UK.
Worth knowing: The US survey foot, very slightly longer, was used in land surveying until it was officially retired at the end of 2022.
Fathoms vs Feet
The fathom is a specialized unit while the foot 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 feet are in a fathom?
One fathom equals 6 feet.
What is the formula to convert fathoms to feet?
Multiply the number of fathoms by 6. To reverse it, divide by 6 instead.
How do I convert feet back to fathoms?
Divide by 6, which is the same as multiplying by 0.166666667.
How many feet are in 10 fathoms?
10 ftm works out to 60 ft.
Is there anything to watch out for with feet?
The US survey foot, very slightly longer, was used in land surveying until it was officially retired at the end of 2022.
How is the fathom defined?
Six international feet, so exactly 1.8288 meters.