Kilometers to nautical miles
Type a value in km to get it in nmi instantly.
That's 1.98× as long as the Channel Tunnel, while the Earth is 127× longer. Walking, you would cover that in 19.84 hours.
Convert the other way: nmi to km
What it means
How long is that?
Reference lengths are typical values. The inch, foot, yard and mile are defined exactly in meters (1 inch = 2.54 cm).
The math
How to convert km to nmi
To convert kilometers to nautical miles, multiply by 0.539957.
Example: 100 km × 0.539957 = 53.9957 nmi.
In the other direction, 1 nmi = 1.852 km.
Every unit
Your length in every unit
Tables
km to nmi conversion table
| km | nmi |
|---|---|
| 1 km | 0.539957 nmi |
| 2 km | 1.07991 nmi |
| 3 km | 1.61987 nmi |
| 5 km | 2.69978 nmi |
| 10 km | 5.39957 nmi |
| 15 km | 8.09935 nmi |
| 20 km | 10.7991 nmi |
| 25 km | 13.4989 nmi |
| 30 km | 16.1987 nmi |
| 50 km | 26.9978 nmi |
| 75 km | 40.4968 nmi |
| 100 km | 53.9957 nmi |
| 150 km | 80.9935 nmi |
| 200 km | 107.991 nmi |
| 500 km | 269.978 nmi |
| 1,000 km | 539.957 nmi |
nmi to km conversion table
| nmi | km |
|---|---|
| 1 nmi | 1.852 km |
| 2 nmi | 3.704 km |
| 3 nmi | 5.556 km |
| 5 nmi | 9.26 km |
| 10 nmi | 18.52 km |
| 15 nmi | 27.78 km |
| 20 nmi | 37.04 km |
| 25 nmi | 46.3 km |
| 30 nmi | 55.56 km |
| 50 nmi | 92.6 km |
| 75 nmi | 138.9 km |
| 100 nmi | 185.2 km |
| 150 nmi | 277.8 km |
| 200 nmi | 370.4 km |
| 500 nmi | 926 km |
| 1,000 nmi | 1,852 km |
Quick answers
Quick answers
- How many nmi is 1 km?
- 1 km is 0.539957 nmi.
- How many nmi is 10 km?
- 10 km is 5.39957 nmi.
- How many nmi is 100 km?
- 100 km is 53.9957 nmi.
The units
About these units
Kilometers (km)
A kilometer is 1,000 meters, about a 12-minute walk. Road distances and running races use it almost everywhere outside the US and UK.
Nautical miles (nmi)
A nautical mile is 1,852 m, originally one minute of latitude. Ships and aircraft use it because it maps directly onto navigation charts.
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