Convert Kilometers to Nautical Miles
Enter the value in kilometers to get its exact equivalent in nautical miles instantly.
How to convert kilometers to nautical miles?
To convert a measurement in kilometers (km) to nautical miles (nmi), we multiply the value by the conversion factor 0.539957.
nmi = km × 0.539957
The nautical mile doesn't belong to the metric or imperial system: it's defined as the length of one minute of arc of latitude on the Earth's surface (exactly 1,852 meters), which is why it's used universally in sea and air navigation, regardless of country.
| Kilometers (km) | Nautical miles (nmi) |
|---|---|
| 1.00 | 0.5400 |
| 5.00 | 2.70 |
| 10.00 | 5.40 |
| 50.00 | 27.00 |
| 100.00 | 54.00 |
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Frequently Asked Questions
How many nautical miles are in 1 kilometer?
1 km equals exactly 0.539957 nautical miles.
Why is the nautical mile used in aviation and navigation?
Because it's based on the Earth's geometry, it makes it easy to calculate routes and coordinates directly on navigation charts, which isn't the case with the kilometer or the land mile.