Convert Kilometer to Nautical Mile
Use this free converter to change kilometers (km) into nautical miles (nmi). Kilometer and nautical mile both measure length. As a quick reference, 1 km equals 0.5399568 nmi, and 1 nmi equals 1.852 km.
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Nautical Mile (nmi)
0.5399568
1 km = 0.5399568 nmi
Length conversion table
| Kilometer | Nautical Mile |
|---|---|
| 0.01 | 0.005399568 |
| 0.1 | 0.05399568 |
| 0.5 | 0.2699784 |
| 1 | 0.5399568 |
| 2 | 1.0799136 |
| 3 | 1.6198704 |
| 5 | 2.699784 |
| 10 | 5.399568 |
| 20 | 10.799136 |
| 25 | 13.49892 |
| 50 | 26.99784 |
| 100 | 53.99568 |
| 1,000 | 539.9568 |
How to convert Kilometer to Nautical Mile
Multiply the kilometer value by 0.5399568 to get nautical miles.
- Enter the number of kilometers you want to convert.
- The converter instantly shows the equivalent value in nautical miles.
- Worked example: 15 km × 0.5399568 = 8.0993521 nmi.
- Use the swap button to reverse the conversion (nautical mile to kilometer).
About these units
Kilometer (km)
- Definition
- A kilometer (km) is 1,000 meters and is the metric unit used for measuring longer distances such as roads and travel.
- History
- It entered use with the metric system in the 1790s, combining the SI prefix "kilo-" (thousand) with the meter.
- Current use
- Most of the world expresses road distances and speed limits in kilometers; the main exceptions are the United States and the United Kingdom, which still use miles.
Nautical Mile (nmi)
- Definition
- A nautical mile (nmi) equals exactly 1,852 meters and corresponds to one minute of latitude along a meridian.
- History
- It was defined by its relationship to the Earth’s circumference and standardised internationally in 1929.
- Current use
- Nautical miles are used in marine and air navigation; one knot equals one nautical mile per hour.
Frequently asked questions
How many nautical miles are in a kilometer?
There are 0.5399568 nmi in 1 km. To convert, multiply the number of kilometers by 0.5399568.
How do I convert kilometers to nautical miles?
Multiply the kilometer value by 0.5399568 to get nautical miles. For example, 10 km = 5.399568 nmi.
Is this kilometer-to-nautical mile converter free?
Yes. This converter is completely free, runs entirely in your browser, and requires no sign-up. Your inputs never leave your device.
Convert Kilometer to other length units
| Unit | 1 Kilometer equals |
|---|---|
| Meter (m) | 1000 m |
| Centimeter (cm) | 100000 cm |
| Millimeter (mm) | 1000000 mm |
| Micrometer (µm) | 1000000000 µm |
| Nanometer (nm) | 1000000000000 nm |
| Mile (mi) | 0.62137119 mi |
| Yard (yd) | 1093.6133 yd |
| Foot (ft) | 3280.8399 ft |
| Inch (in) | 39370.079 in |
| Nautical Mile (nmi) | 0.5399568 nmi |
| Light Year (ly) | 1.0570e-13 ly |