Length and Area
kmtonmi
Convert kilometres (km) to nautical miles (nmi).
Factor1 km = 0.5399568 nmi
Converter
km
Accepts numbers or expressions, e.g. 150 + 14.7
Result
nmi
Rendered to 6 significant figures.
Formula
Formula
nmi = km × 0.5399568
Multiply any value in kilometres by 0.5399568 to obtain the value in nautical miles.
Worked example
Convert 100 km to nmi.
- 01Start with 100 km.
- 02Multiply by the conversion factor: 100 × 0.5399568 = 53.9957 nmi.
Result100 km = 53.9957 nmi
Conversion table
| km | nmi |
|---|---|
| 1 | 0.53996 |
| 2 | 1.0799 |
| 5 | 2.6998 |
| 10 | 5.3996 |
| 20 | 10.799 |
| 50 | 26.998 |
| 100 | 53.996 |
| 200 | 107.99 |
| 500 | 269.98 |
| 1000 | 539.96 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from km to nmi?
1 km equals 0.5399568 nmi. To convert, multiply the value in kilometres by 0.5399568.
How do I convert 1 km to nmi?
1 km = 0.539957 nmi. For any value, multiply by 0.5399568.
How do I convert nmi back to km?
Divide by the same factor — or equivalently, multiply by 1.852. So 1 nmi = 1.852 km.
When would I need to convert kilometre to nautical mile?
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 nmi are defined by exact SI relationships, so the displayed factor is exact (any rounding shown is only for display).