Quick facts for kidsKilometres per hour
A car speedometer that indicates measured speed in kilometres per hour
|1 km/h in ...||... is equal to ...|
Although the metre was formally defined in 1799, the term "kilometres per hour" did not come into immediate use. The Dutch on the other hand adopted the kilometre in 1817 but gave it the local name of the mijl.
Several representations of "kilometres per hour" have been used since the term was introduced and many are still in use today; for example, dictionaries list "km/h", "kmph" and "km/hr" as English abbreviations.
Abbreviations for "kilometres per hour" did not appear in the English language until the late nineteenth century. In Australian unofficial usage, km/h is sometimes pronounced and written as klicks or clicks.
Images for kids
Speed limit in km/h on a road in the Northern Territory, Australia
Kilometres per hour Facts for Kids. Kiddle Encyclopedia.