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Conversion Mile per hour to Kilometer per hour (mph to kph). Miles per hour (symbol mph or mi/h) is unit of speed, expressing the number of statute miles covered in one hour. It is currently the standard unit used for speed limits, and to express speeds generally, on roads in the United Kingdom and the United States. This tool converts miles per hour to kilometers per hour (mph to kph) or (mph to km/h) and vice versa. 1 mile per hour = 1.60934 kilometers per hour.
Cancel. Knots and miles per hour are both units used to measure speed. Find out how fast 12 knots is when converted to miles per hour with help from a high school math tutor and teacher in this free video clip. Part of the Video Series: Math Conversions.