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0.44704. Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom, the United States, and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.
Since 1970, the kilometre per hour, symbol km/h, has become the global standard unit for the measurement of road speeds and the setting of speed limits. The UK is now one of only two major countries holding out with speed limits in miles per hour. Speed limits in km/h are the global standard
Definition: The unit kilometers per hour (symbol: km/h) is a unit of speed expressing the number of kilometers traveled in one hour. History/origin: The unit of kilometers per hour is based on the meter, which was formally defined in 1799. According to the Oxford English Dictionary, the term kilometer first came into use in 1810.
Speed limit sign in the Republic of Ireland, using "km/h.". The SI representations, classified as symbols, are "km/h", "km h −1" and "km·h −1".Several other abbreviations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for example, dictionaries list "kph", [3] [4] [5] "kmph" and "km/hr" [6] as English abbreviations.
Jul 15, 2024 · How to Convert Kilometers per Hour to Miles per Hour. To convert kilometers per hour to miles per hour, you can use a conversion formula: mph = km/h / 1.609344. Simply divide the speed in km/h by 1.609344 to get the equivalent speed in mph. For example, if you want to convert 100 km/h to mph, you would divide 100 by 1.609344 and get 62.137119 mph.
The units of speed are miles per hour so the time must be in hours. There are 60 minutes in one hour. 30 minutes is half an hour. Overall time for the journey is 2.5 hours.
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That number has more significant digits, so it's more precise. Likewise, if I'm travelling at 1 m/s, that's actually 3.6km/h. If I round the km/h number to 4km/h, that introduces an uncertainty of almost a quarter. Because m/s is a much smaller unit than km/h, it's common for it to be more precise.
