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Nm to Km Converter
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Converted result
km = NM × 1.852
Nautical Mile Definition & Formula
Marine Navigation Calculations
The conversion is km = NM × 1.852. This factor is exact by international definition (adopted in 1929). One nautical mile equals one minute of arc of latitude along any meridian. Common conversions: 10 NM = 18.52 km, 50 NM = 92.6 km, 100 NM = 185.2 km, 500 NM = 926 km. Vessel passage distances are always reported in nautical miles in maritime navigation.
GPS Distance Measurement
Marine GPS displays distance in nautical miles by default. When integrating GPS data with land-based mapping (which uses km or miles), conversion is essential. Aviation GPS also uses nautical miles for distance and knots (NM/h) for speed. One knot = 1 NM/h = 1.852 km/h. For the reverse conversion, see our km to nautical miles converter.
Frequently Asked Questions
1 nautical mile = 1.852 kilometers exactly. This is the international definition adopted in 1929.
A nautical mile is based on Earth geometry (1 minute of latitude = 1 NM), while a statute mile is a land measurement (5,280 feet). 1 NM = 1.15078 statute miles.
Yes. 1 knot = 1 nautical mile per hour = 1.852 km/h = 1.15078 mph.