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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.
Alternatively, just multiply your WPM by 300 to get your KPH. If you do both, you may note that the online conversion number is smaller; online conversion utilities base their calculation on something less than 60 minutes of productivity per hour -- usually 50 minutes -- for a more achievable speed.