Miles Per Hour to Kilometres Per Hour Speed Conversion
Speed conversions between miles per hour (mph, miph, m/h, mi/h) and kilometres per hour (kph, kmph, km/h) are usually used for calculating speed limits when driving abroad, espcially for UK and US drivers. Miles per hour are used in the United States and in the UK. Despite the UK having legally converted to metric for most measures, miles and miles per hour are still used on all road signs. Kilometres per hour are used in all other major countries.
The conversion tables, below, offer a quick lookup to convert miles per hour to kilometres per hour for commonly sought values or you can use our quick converter utility above. Alternatively you can look at our full conversion tables.
Miles Per Hour to Kilometres Per Hour Conversion Tables




Other abbreviations that are sometimes used for miles per hour include m/h and mi/h.
The following conversion tables offer a quick lookup to convert kilometres per hour to miles per hour for commonly sought values. Alternatively you can look at our full conversion tables
Kilometres Per Hour to Miles Per Hour Conversion Tables




Other abbreviations that are occasionally used for kilometres per hour include kmph, k/h and km/h.
Conversion Formulae
Miles Per Hour to Kilometres Per Hour Conversion Formula
The conversion formula for miles to kilometres is quite simple:
1 mph = 1.609344 kph
Kilometres Per Hour to Miles Per Hour Conversion Formula
The conversion formula for kph to mph is simply the reciprocal of the miles to kilometres formula:
1 kilometre = 0.621371192 miles
Countries Using Miles Per Hour
The following countries use mph as their standard speed measurement:
United States, Liberia, Myanmar all use mph as their official standard and the United Kingdom, although officially using the metric system, still uses miles per hour for speed limits and on road signs.
Countries Using Kilometres Per Hour
The rest of the world uses kilometres per hour, including the former British colonies such as Australia, New Zealand and Canada.
More Motoring Conversions
The following conversions to help you convert motoring related units from US & UK figures (miles, miles per gallon) to International and European figures (kilometres, kilometres per litre):
Distance Conversion
Fuel Economy Conversions
Miles Per Gallon to Kilometres Per Litre
Miles Per Gallon to Litres Per 100km
Miles Per US Gallon to Miles Per UK Gallon
Miles Per Gallon to Miles Per Litre
Miles Per Gallon to Kilometres Per Gallon