Kilometres to Nautical Miles
Convert kilometres (km) to nautical miles (nmi) instantly — with formula and reference table.
km
nmi
Quick answer: 1 km = 0.539957 nmi. To convert kilometres to nautical miles, multiply by km × 0.539957.
Converting kilometres to nautical miles
This converter changes a value in kilometres (km) into nautical miles (nmi). One kilometre equals 0.539957 nmi. To convert kilometres to nautical miles, divide by 1.852 (or multiply by 0.539957). The conversion runs entirely in your browser — enter a value and the result updates instantly, in either direction.
Formula
nmi = km × 0.539957
Example
Convert 10 km to nmi: 10 × 0.539957 = 5.399568 nmi.
Kilometres to Nautical Miles conversion table
| Kilometres (km) | Nautical Miles (nmi) |
|---|---|
| 1 km | 0.539957 nmi |
| 2 km | 1.079914 nmi |
| 3 km | 1.61987 nmi |
| 5 km | 2.699784 nmi |
| 10 km | 5.399568 nmi |
| 20 km | 10.799136 nmi |
| 25 km | 13.49892 nmi |
| 50 km | 26.99784 nmi |
| 100 km | 53.99568 nmi |
How to use this converter
- Enter a value in the kilometres (km) field.
- Read the converted value in nautical miles (nmi) below.
- Type into the nmi field instead to convert in reverse, or use the swap button.
Frequently asked questions
How many nautical miles are in a kilometre?
1 kilometre equals 0.539957 nautical miles.
How do I convert 50 km to nautical miles?
50 times 0.539957 = 27 nautical miles.
Who uses nautical miles?
Ships, aircraft and weather services use nautical miles because they map directly onto latitude and longitude.