Need a quick and easy way to visually discover the difference between miles and kilometers? 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 miles and kilometers visually. 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! One international mile = 0.999 998 survey mile (exactly). There are different miles which are in common use even today. For example : nautical mile, statute mile, and Roman mile.