Nautical miles to kilometers (nmi to km)
Convert nautical miles to kilometers. For length, 1 nmi equals 1.852 km.
Converter
nmi to km conversion table
| Nautical miles | Kilometers |
|---|---|
| 1 nmi | 1.852 km |
| 2 nmi | 3.704 km |
| 5 nmi | 9.26 km |
| 10 nmi | 18.52 km |
| 25 nmi | 46.3 km |
| 50 nmi | 92.6 km |
| 100 nmi | 185.2 km |
| 1000 nmi | 1852 km |
Formula
km = nmi × 1.852
Worked example
25 nmi × 1.852 = 46.3 km
Popular conversion examples
Choose an example to open this converter with the value filled in. These are useful examples, not a claim about search rankings.
- 1 nmi to km = 1.852 km
- 5 nmi to km = 9.26 km
- 100 nmi to km = 185.2 km
- 400 nmi to km = 740.8 km
- 30 km to nmi = 16.1987 nmi
- 12 km to nmi = 6.47948 nmi
About nautical miles and kilometers
Nautical mile (nmi)
The international nautical mile is exactly 1,852 meters. It is used in marine and air navigation, where it is tied to one minute of latitude.
Kilometer (km)
A kilometer is 1,000 meters. It is the standard unit for road distances and mapping in most of the world.
Both are units of length; the base unit used internally is m.
Notes
- The inch, foot, yard and mile are the international units, defined exactly in meters (1 in = 0.0254 m). US survey units are not included.
- The nautical mile is the international nautical mile, exactly 1,852 m.
- Negative values are accepted because length can represent a signed displacement.
nmi to km FAQs
How do I convert nautical miles to kilometers?
Multiply the number of nautical miles by 1.852 to get kilometers. For example, 25 nmi × 1.852 = 46.3 km.
How many kilometers are in one nautical mile?
1 nmi = 1.852 km and 1 km = 0.5399568035 nmi. To go the other way, use the kilometers to nautical miles converter.
How many kilometers are in 200 nautical miles?
200 nmi = 370.4 km, rounded to 6 significant digits. Change the value in the converter above for any other amount.
How many kilometers are in 10 nautical miles?
10 nmi = 18.52 km, rounded to 6 significant digits.
Is the nmi to km conversion exact?
Yes. The factor 1.852 follows directly from the unit definitions (The international nautical mile is exactly 1,852 meters; a kilometer is 1,000 meters), so the only rounding is in the digits you choose to display.
What is the difference between nautical miles and kilometers?
The international nautical mile is exactly 1,852 meters. It is used in marine and air navigation, where it is tied to one minute of latitude. A kilometer is 1,000 meters. It is the standard unit for road distances and mapping in most of the world.
How long is a nautical mile?
The international nautical mile is exactly 1,852 meters (1.852 km), about 1.15078 statute miles.
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Guide
Read: Nautical Mile vs Mile, and What a Knot Is.