Length and Area
ftmtoch
Convert fathoms (ftm) to chains (ch).
Factor1 ftm = 0.09090909 ch
Converter
ftm
Accepts numbers or expressions, e.g. 150 + 14.7
Result
ch
Rendered to 6 significant figures.
Formula
Formula
ch = ftm × 0.09090909
Multiply any value in fathoms by 0.09090909 to obtain the value in chains.
Worked example
Convert 11 ftm to ch.
- 01Start with 11 ftm.
- 02Multiply by the conversion factor: 11 × 0.09090909 = 1 ch.
Result11 ftm = 1 ch
Conversion table
| ftm | ch |
|---|---|
| 1 | 0.090909 |
| 2 | 0.18182 |
| 5 | 0.45455 |
| 10 | 0.90909 |
| 20 | 1.8182 |
| 50 | 4.5455 |
| 100 | 9.0909 |
| 200 | 18.182 |
| 500 | 45.455 |
| 1000 | 90.909 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from ftm to ch?
1 ftm equals 0.09090909 ch. To convert, multiply the value in fathoms by 0.09090909.
How do I convert 1 ftm to ch?
1 ftm = 0.0909091 ch. For any value, multiply by 0.09090909.
How do I convert ch back to ftm?
Divide by the same factor — or equivalently, multiply by 11. So 1 ch = 11 ftm.
When would I need to convert fathom to chain (Gunter's chain)?
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).