# Km/h: Wikis

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# Encyclopedia

(Redirected to Kilometres per hour article)

The kilometre per hour (American English: kilometer per hour) is a unit of speed or velocity, expressing the number of kilometers traveled in one hour. The unit symbol is km/h or km·h−1; however, the colloquial abbreviations "kph" and "kmph" are sometimes also used in English-speaking countries, in analogy to mph, although these are not in accordance with international scientific standards. In North American slang and military usage, km/h (as well as km) is commonly pronounced, and sometimes even written, as klicks or kays (K's), although these may also be used to refer to kilometres.

Worldwide, the km/h is the most commonly used speed unit on road signs and car speedometers. Therefore, it is far more common in everyday usage than the proper SI unit of speed, m/s. Along with the kW·h, km/h is the most commonly used metric unit based on the hour, which is only a "non-SI unit accepted for use with the International System of Units" by the BIPM.[1]

## References

1. ^ BIPM brochure (SI reference)
2. ^ 1 yard ≡ 0.9144 m and
1 mile = 1760 yards thus
1 mile = 1760 × 0.9144 ÷ 1000 km

# Wiktionary

Up to date as of January 15, 2010
(Redirected to km/h article)

## Translingual

### Abbreviation

km/h

1. kilometers per hour

## Swedish

### Etymology

From km (kilometer) + h (French heure or English hour)

### Abbreviation

km/h

1. kilometers per hour