Nautical Miles to Km Converter

1 nautical mile = 1.852 km exactly. Multiply nautical miles by 1.852. So 100 nm × 1.852 = 185.2 km. The nautical mile is defined as exactly 1,852 metres - chosen to equal 1 minute of latitude (1/60 of a degree) along Earth's meridian, making navigation and chart work elegantly aligned.

Used for: ocean/sea distance, aviation flight distance, maritime law (12 nautical miles = territorial waters). London to New York: 3,000 nautical miles = 5,556 km = 3,453 statute miles. The nautical mile differs from the statute (regular) mile (1,609 m) - 1 nm = 1.151 statute miles. Don't conflate them in distance estimates.