The kilometre per hour (American English: kilometer per hour) is a unit of both speed (scalar) and velocity (vector).

The velocity in kilometers per hour is equal to the distance in kilometers divided by time in hours.

[38], For the South African airport with IATA code KMH, see, Alternative abbreviations in official use, Conversions between common units of speed, Until 2010, the directive covered "economic, public health, public safety or administrative purposes"; since then, Vienna Convention on Road Signs and Signals, United Nations Economic and Social Council, National Highway Traffic Safety Administration, "A Review of Some European Electric Locomotive Designs", "Data on Mixed Motor Fuels of Interest for American Export Trade", "Tractive resistance tests with an electric motor truck", "French Railway Begins Electrification Program", International Bureau of Weights and Measures, International Organization of Legal Metrology, International Federation of Red Cross and Red Crescent Societies, "Council Directive 80/181/EEC of 20 December 1979 on the approximation of the laws of the Member States relating to Unit of measurement and on the repeal of Directive 71/354/EEC", "Federal Motor Vehicle Safety Standards; FMVSS 101--Technical Correction--Speedometer Display", https://en.wikipedia.org/w/index.php?title=Kilometres_per_hour&oldid=986264904, Articles with unsourced statements from October 2019, Articles with unsourced statements from June 2019, Creative Commons Attribution-ShareAlike License, This page was last edited on 30 October 2020, at 19:53.

Road speed limits are given in kilometers per hour which is abbreviated as kph or km/h.

Many countries have since signed the convention and adopted its proposals. Kilometers per hour and miles per hour are both units used to measure speed. …

Many countries have since signed the convention and adopted its proposals. Miles per hour can be expressed using the formula: kilometers per hour to kilometers per second, kilometers per hour to centimeters per second, convert miles per hour to kilometers per hour.

The kilometer per hour, or kilometre per hour, is an SI unit of speed in the metric system. Another EU directive, published in 1975, regulates the layout of speedometers within the European Union, and requires the text "km/h" in all languages,[36] even where that is not the natural abbreviation for the local version of "kilometres per hour".

usually plural (speed) kilómetro por hora loc nom m locución nominal masculina : Unidad léxica estable formada de dos o más palabras que funciona como sustantivo masculino ("ojo de buey", "agua mala"). National Institute of Standards and Technology, NIST Guide to the SI, https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors/nist-guide-si-appendix-b8, National Institute of Standards and Technology, NIST Guide to the SI, Chapter 6: Rules and Style Conventions for Printing and Using Units, https://www.nist.gov/pml/special-publication-811/nist-guide-si-chapter-6-rules-and-style-conventions-printing-and-using, Wikipedia, Miles per hour, https://en.wikipedia.org/wiki/Miles_per_hour. A mile per hour is a unit of speed commonly used in the United States.

SI is also the preferred system of measure in academia and in education.[31].

A kilometer per hour is a unit of speed. On May 15, 2000 this was clarified to read "MPH, or MPH and km/h". In 1968 the Vienna Convention on Road Signs and Signals was drawn up under the auspices of the United Nations Economic and Social Council to harmonise road signs across the world. kilometre per hour (UK) n noun: Refers to person, place, thing, quality, etc. The velocity in miles per hour is equal to the distance in miles divided by time in hours. Enter the speed in kilometers per hour below to get the value converted to miles per hour. Examples include: In 1988 the United States National Highway Traffic Safety Administration promulgated a rule stating that "MPH and/or km/h" were to be used in speedometer displays. It is equal to exactly 1.609344 kilometers per hour. During the early years of the motor car, each country developed its own system of road signs. A kilometer per hour is a unit of speed. s−1"). [2], Kilometers per hour can be expressed using the formula: vkm/s = dkmthr. Kilometers per hour are a measurement of speed expressing the distance traveled in kilometers in one hour.

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