Nautical miles per hour to kilometers per hour converter on this page calculates how many kilometers per hour are in 'X' nautical miles per hour (where 'X' is the number of nautical miles per hour to convert to kilometers per hour). In order to convert a value from nautical miles per hour to kilometers per hour (from nmi/h to km/h) just type the number of nmi/h to be converted to km/h and then click on the 'convert' button.