Length and Area
kmtoch
Convert kilometres (km) to chains (ch).
Factor1 km = 49.7097 ch
Converter
km
Accepts numbers or expressions, e.g. 150 + 14.7
Result
ch
Rendered to 6 significant figures.
Formula
Formula
ch = km × 49.7097
Multiply any value in kilometres by 49.7097 to obtain the value in chains.
Worked example
Convert 1 km to ch.
- 01Start with 1 km.
- 02Multiply by the conversion factor: 1 × 49.7097 = 49.7097 ch.
Result1 km = 49.7097 ch
Conversion table
| km | ch |
|---|---|
| 1 | 49.71 |
| 2 | 99.419 |
| 5 | 248.55 |
| 10 | 497.1 |
| 20 | 994.19 |
| 50 | 2485.5 |
| 100 | 4971 |
| 200 | 9941.9 |
| 500 | 24855 |
| 1000 | 49710 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from km to ch?
1 km equals 49.7097 ch. To convert, multiply the value in kilometres by 49.7097.
How do I convert 1 km to ch?
1 km = 49.7097 ch. For any value, multiply by 49.7097.
How do I convert ch back to km?
Divide by the same factor — or equivalently, multiply by 0.0201168. So 1 ch = 0.0201168 km.
When would I need to convert kilometre 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).