Foot to Fathom Converter
Convert Foot (ft) to Fathom (ftm) instantly. 1 ft = 0.166667 ftm.
Length Converter
31 units available
1 ft = 0.166667 ftm
Formula:
ftm = ft × 0.1666666667With your value: 1 ft = 0.16666667 ftm
How big is that?
Everyday references on a logarithmic scale, all expressed in foot so you can sanity-check the result.
Other Foot to Fathom conversions
Foot to Fathom Conversion Table
| Foot (ft) | Fathom (ftm) |
|---|---|
| 0.5 | 0.083333 |
| 1 | 0.166667 |
| 2 | 0.333333 |
| 5 | 0.833333 |
| 10 | 1.666667 |
| 15 | 2.5 |
| 20 | 3.333333 |
| 25 | 4.166667 |
| 50 | 8.333333 |
| 100 | 16.666667 |
| 250 | 41.666667 |
| 500 | 83.333333 |
| 1000 | 166.666667 |
Fathom to Foot Conversion Table
| Fathom (ftm) | Foot (ft) |
|---|---|
| 0.5 | 3 |
| 1 | 6 |
| 2 | 12 |
| 5 | 30 |
| 10 | 60 |
| 15 | 90 |
| 20 | 120 |
| 25 | 150 |
| 50 | 300 |
| 100 | 600 |
| 250 | 1,500 |
| 500 | 3,000 |
| 1000 | 6,000 |
Where these values come from
Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.
Foot (ft)
Length
1 foot = 0.3048 m exactly (international foot, 1959).
The US survey foot (1200/3937 m) was deprecated for new work on 31 December 2022 and differs by about 2 ppm.
Source: International Yard and Pound Agreement of 1959; NIST Federal Register Notice 59-5442
US, UK, Canada, Australia, New Zealand, South Africa · Reviewed 2026-07-01
Fathom (ftm)
Length
Traceable to the metre, defined by fixing the speed of light in vacuum at 299 792 458 m/s. Imperial lengths derive from the 1959 international yard (0.9144 m exactly).
Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)
Bureau International des Poids et Mesures · Reviewed 2026-07-01
How to Convert Foot to Fathom
To convert from Foot (ft) to Fathom (ftm), multiply the value by 0.1666666667.
Formula: ftm = ft × 0.1666666667
Reverse: ft = ftm × 6
Step-by-Step Example
- Start with your value in Foot. For example: 5 ft
- Multiply by the conversion factor: 5 x 0.1666666667
- The result is: 0.833333 ftm
About Foot
The foot is an imperial unit equal to 12 inches or 0.3048 meters. It remains widely used in the US, UK, and Canada for everyday measurements.
Fun Fact: The foot was originally based on the length of a human foot, which varied from region to region.
Common uses: height measurement, real estate, construction.
About Fathom
The fathom equals 6 feet (1.8288 m) and is the traditional unit for water depth on nautical charts.
Fun Fact: The word comes from the Old English "fæðm", the span of a man's outstretched arms.
Common uses: sounding depth, nautical charts, diving.
Frequently Asked Questions
How many Fathom are in 1 Foot?
There are exactly 0.1666666667 Fathom in 1 Foot. This means the conversion factor from Foot to Fathom is 0.1666666667.
What is the formula to convert Foot to Fathom?
The formula to convert Foot to Fathom is: ftm = ft × 0.1666666667. For example, to convert 10 Foot to Fathom, you would multiply 10 by 0.1666666667.
What is a Foot?
The foot is an imperial unit equal to 12 inches or 0.3048 meters. It remains widely used in the US, UK, and Canada for everyday measurements.
What is a Fathom?
The fathom equals 6 feet (1.8288 m) and is the traditional unit for water depth on nautical charts.
What are the common uses of Foot?
The Foot is commonly used in height measurement, real estate, construction.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Foot to Fathom converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/foot-to-fathom