Chain to Fathom Converter
Convert Chain (ch) to Fathom (ftm) instantly. 1 ch = 11 ftm.
Length Converter
31 units available
1 ch = 11 ftm
Formula:
ftm = ch × 11With your value: 1 ch = 11 ftm
How big is that?
Everyday references on a logarithmic scale, all expressed in chain so you can sanity-check the result.
Other Chain to Fathom conversions
Chain to Fathom Conversion Table
| Chain (ch) | Fathom (ftm) |
|---|---|
| 0.5 | 5.5 |
| 1 | 11 |
| 2 | 22 |
| 5 | 55 |
| 10 | 110 |
| 15 | 165 |
| 20 | 220 |
| 25 | 275 |
| 50 | 550 |
| 100 | 1,100 |
| 250 | 2,750 |
| 500 | 5,500 |
| 1000 | 11,000 |
Fathom to Chain Conversion Table
| Fathom (ftm) | Chain (ch) |
|---|---|
| 0.5 | 0.045455 |
| 1 | 0.090909 |
| 2 | 0.181818 |
| 5 | 0.454545 |
| 10 | 0.909091 |
| 15 | 1.363636 |
| 20 | 1.818182 |
| 25 | 2.272727 |
| 50 | 4.545455 |
| 100 | 9.090909 |
| 250 | 22.727273 |
| 500 | 45.454545 |
| 1000 | 90.909091 |
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.
Chain (ch)
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
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 Chain to Fathom
To convert from Chain (ch) to Fathom (ftm), multiply the value by 11.
Formula: ftm = ch × 11
Reverse: ch = ftm × 0.0909090909
Step-by-Step Example
- Start with your value in Chain. For example: 5 ch
- Multiply by the conversion factor: 5 x 11
- The result is: 55 ftm
About Chain
Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.
Common uses: land surveying, cadastral records, cricket pitch length.
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 Chain?
There are exactly 11 Fathom in 1 Chain. This means the conversion factor from Chain to Fathom is 11.
What is the formula to convert Chain to Fathom?
The formula to convert Chain to Fathom is: ftm = ch × 11. For example, to convert 10 Chain to Fathom, you would multiply 10 by 11.
What is a Chain?
Gunter's chain equals 66 feet (20.1168 m) and underpins the US Public Land Survey System: 10 square chains make one acre.
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 Chain?
The Chain is commonly used in land surveying, cadastral records, cricket pitch length.
Related Length Conversions
Cite this page
UnitConvertLab. (2026). Chain to Fathom converter. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/chain-to-fathom