Length and Area
chtoftm
Convert chains (ch) to fathoms (ftm).
Factor1 ch = 11 ftm
Converter
ch
Accepts numbers or expressions, e.g. 150 + 14.7
Result
ftm
Rendered to 6 significant figures.
Formula
Formula
ftm = ch × 11
Multiply any value in chains by 11 to obtain the value in fathoms.
Worked example
Convert 1 ch to ftm.
- 01Start with 1 ch.
- 02Multiply by the conversion factor: 1 × 11 = 11 ftm.
Result1 ch = 11 ftm
Conversion table
| ch | ftm |
|---|---|
| 1 | 11 |
| 2 | 22 |
| 5 | 55 |
| 10 | 110 |
| 20 | 220 |
| 50 | 550 |
| 100 | 1100 |
| 200 | 2200 |
| 500 | 5500 |
| 1000 | 11000 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ch to ftm?
1 ch equals 11 ftm. To convert, multiply the value in chains by 11.
How do I convert 1 ch to ftm?
1 ch = 11 ftm. For any value, multiply by 11.
How do I convert ftm back to ch?
Divide by the same factor — or equivalently, multiply by 0.09090909. So 1 ftm = 0.0909091 ch.
When would I need to convert chain (Gunter's chain) to fathom?
Length conversions appear in piping, layout, and mechanical drawings — particularly when reconciling imperial fittings or instrument lengths with metric plant drawings.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).