Nautical Miles to Kilometers Converter - Version 1 Need a quick and easy way to visually discover the difference between nautical miles and kilometers? Nautical Miles to Kilometers Converter is the way to go! Simply watch conversions appear before your eyes as you slide up and down the measurement scale! Its that easy. You will soon discover general relations between nautical miles and kilometers visually. Nautical Miles to Kilometers Converter is a great tool for both teacher and student alike! The kilometer (commonly spelled kilometre) is one thousand meters. The French National Assembly decided in 1791 to define the kilometer to be 1/100,000 the distance from the equator to the north pole! The nautical mile or sea mile is used by sailors to navigate the oceans. Historically, the nautical mile was defined as a minute of arc along a meridian of the Earth, making a meridian exactly 10,800 historical nautical miles