Nautical Miles to km
Convert nautical miles to kilometers and back. Ships, aircraft and territorial waters are measured in nautical miles.
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Common values
Formula
km = nmi × 1.852
One nautical mile is exactly 1.852 km — originally one minute of latitude. A 12-nautical-mile limit is about 22 km.
Frequently asked questions
Q. How many km is 1 nmi?
1 nmi is 1.852 km, and 10 nmi is 18.52 km. Type any value in the box above to convert instantly.
Q. And how many nmi is 1 km?
1 km is 0.54 nmi. This converter works both ways, so typing in the right box updates the left one.
Q. Where is this unit used?
One nautical mile is exactly 1.852 km — originally one minute of latitude. A 12-nautical-mile limit is about 22 km.
Other converters
Traditional units (geun, doe, majigi and so on) vary by region and product.