Convert Kilometer to Nautical Mile
Convert Kilometer to Nautical Mile instantly. 1 km = 0.539957 nmi. Formula, worked examples and a quick reference table.
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One kilometer equals 0.539957 nautical mile. To convert any number of kilometers to nautical miles, multiply by 0.5399568.
The converter above works in both directions and updates as you type. Below you will find the formula, a worked example and a reference table of common values.
Kilometer to Nautical Mile formula
To go the other way, use kilometer = nautical mile ÷ 0.5399568.
About these units
A nautical mile is one minute of latitude, which is why it is the natural unit at sea and in the air. It was fixed at exactly 1,852 metres in 1929.
Kilometer to Nautical Mile conversion table
| Kilometer | Nautical Mile |
|---|---|
| 1 km | 0.54 nmi |
| 2 km | 1.0799 nmi |
| 3 km | 1.6199 nmi |
| 5 km | 2.6998 nmi |
| 10 km | 5.3996 nmi |
| 20 km | 10.7991 nmi |
| 25 km | 13.4989 nmi |
| 50 km | 26.9978 nmi |
| 100 km | 53.9957 nmi |
| 250 km | 134.9892 nmi |
| 500 km | 269.9784 nmi |
| 1,000 km | 539.9568 nmi |
Frequently asked questions
How many nautical miles are in a kilometer? +
There are 0.539957 nautical miles in one kilometer.
What is 10 km in nmi? +
10 km equals 5.3996 nmi. Multiply 10 by 0.5399568.
How do I convert nautical mile back to kilometer? +
Use kilometer = nautical mile ÷ 0.5399568. The converter above handles both directions, or see our dedicated Nautical Mile to Kilometer page.