Length and Area
kmtoin
Convert kilometres (km) to inches (in).
Factor1 km = 39370.08 in
Converter
km
Accepts numbers or expressions, e.g. 150 + 14.7
Result
in
Rendered to 6 significant figures.
Formula
Formula
in = km × 39370.08
Multiply any value in kilometres by 39370.08 to obtain the value in inches.
Worked example
Convert 1 km to in.
- 01Start with 1 km.
- 02Multiply by the conversion factor: 1 × 39370.08 = 39370.1 in.
Result1 km = 39370.1 in
Conversion table
| km | in |
|---|---|
| 1 | 39370 |
| 2 | 78740 |
| 5 | 1.9685e+5 |
| 10 | 3.9370e+5 |
| 20 | 7.8740e+5 |
| 50 | 1.9685e+6 |
| 100 | 3.9370e+6 |
| 200 | 7.8740e+6 |
| 500 | 1.9685e+7 |
| 1000 | 3.937e+7 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from km to in?
1 km equals 39370.08 in. To convert, multiply the value in kilometres by 39370.08.
How do I convert 1 km to in?
1 km = 39370.1 in. For any value, multiply by 39370.08.
How do I convert in back to km?
Divide by the same factor — or equivalently, multiply by 2.54e-5. So 1 in = 2.54e-5 km.
When would I need to convert kilometre to inch?
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?
Yes. Both km and in are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).