FANDOM


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

The km/h is the worldwide 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]

ConversionsEdit

  • 3.6 km/h ≡ 1 m/s, the SI derived unit of speed, metre per second
  • 1 km/h ≈ 0.277 78 m/s
  • 1 km/h ≈ 0.621 37 mph ≈ 0.911 34 feet per second
  • knot ≡ 1.852 km/h (exactly)
  • 1 mile = 1.609344 km (~1.61 km)[2]
  • 1 mile per hour = ~1.61 kilometres per hour
  • 1 kilometre per hour = ~0.62 miles per hour

See alsoEdit

ReferencesEdit

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

External links Edit

Smallwikipedialogo This page uses some content from Wikipedia. The original article was at Kilometres per hour. The list of authors can be seen in the page history. As with Tractor & Construction Plant Wiki, the text of Wikipedia is available under the Creative Commons by Attribution License and/or GNU Free Documentation License. Please check page history for when the original article was copied to Wikia

Community content is available under CC-BY-SA unless otherwise noted.