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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.
Â· just now. 1  Multiply the 80 by 5/8-- answer is 50 miles per hour. hoarseman Â· 8 years ago. 2  Ok, 80miles/hour is equivalent to 80 miles in one hour. We want to convert meters per second into miles per hour, so that we can compare the 2 speeds. 3  80 Kph To Mph. Source(s): https://shrinks.im/a8gc5. 4  1 kilometer = 0.621371192 miles.