Kilometers (km) to Nautical miles (nmi) Conversion
Kilometers
The kilometre, equal to exactly 1,000 metres, is the standard unit for measuring distances at a geographic and infrastructural scale, including road distances, flight paths, and the dimensions of countries and continents. It is derived directly from the metre by applying the SI prefix kilo- (from Greek khilioi, meaning thousand) and is universally used in science, meteorology, and everyday life in all countries that have adopted the metric system. The Earth's circumference at the equator is approximately 40,075 km, a value historically used in the original derivation of the metre itself.
Nautical miles
The nautical mile is a unit of length equal to exactly 1,852 metres, adopted internationally in 1929. Unlike most length units, it is geometrically derived: it corresponds to one arcminute (1/60 of a degree) of latitude, making it naturally suited to navigation on the spherical surface of the globe. Speed in nautical miles per hour is expressed in knots.
| Kilometers (km) | Nautical miles (nmi) |
|---|---|
| 0.1 km | 0.054 nmi |
| 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 |
| 30 km | 16.1987 nmi |
| 50 km | 26.9978 nmi |
| 100 km | 53.9957 nmi |
| 1000 km | 539.9568 nmi |
Frequently Asked Questions (FAQ)
How many nautical miles are in 1 kilometers?
1 kilometers (km) is exactly 0.539957 nautical miles (nmi).
How do I convert kilometers to nautical miles?
Multiply the value in kilometers by 0.539957 to get the result in nautical miles. Or use the converter above — type any number and see the result instantly.