How many nautical miles are in 1 kilometer?

1 kilometer equals 0.539957 nmi.

How do I convert nautical miles back to kilometers?

Use the reverse converter: 1 nautical mile equals 1.852 km.

Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.

To convert kilometers to nautical miles, multiply the value by 0.539956803.

nmi = km × 0.539956803

40 km × 0.539956803 = 21.6 nmi

Kilometer (km): Used for road distances in almost every country except the US and UK. Equal to 1,000 metres.
Nautical Mile (nmi): Used in sea and air navigation worldwide. Defined internationally as exactly 1,852 metres, close to one minute of latitude.

How do I convert kilometers to nautical miles?: To convert kilometers to nautical miles, multiply the value by 0.539956803.
How many nautical miles are in 1 kilometer?: 1 kilometer equals 0.539957 nmi.
How many nautical miles are in 10 kilometers?: 10 km equals 5.39957 nmi.
How do I convert nautical miles back to kilometers?: Use the reverse converter: 1 nautical mile equals 1.852 km.
Is this converter accurate?: Yes. It uses the exact SI/NIST definitions of each unit and shows up to 6 significant digits.