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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.
A distance of one international mile or 1 760 international yards or exactly 1609.344 meters travelled in one hour or exactly 3 600 seconds. 1 Mile per hour = 1.60934 kilometers per hour = 0.44704 meters per second (SI base unit). 1 mph = 0.447 04 m/s. 1 Mach Number: The ratio of the speed of an object moving through a fluid to the speed of sound in the same fluid. Under standard conditions at sea level this is roughly 340.29 meters per second for travel through air.