Kilometers per hour

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Kilometers per hour is a unit of measurement using length in kilometers and time in hours, and thus it acts as a derived unit for both speed and velocity. The proper shorthand for this unit is km/h,[1] however kph or kmph are sometimes used.

Traffic speed limits in Canada are posted in km/h in addition to automobile speedometers for the country using the same units. Both speed and velocity are measured by taking the distance traveled during some duration, and dividing that length by a time.


  • Road speed limitations in Canada range anywhere from 10 km/h (6.2 mph) to 120 km/h (74.6 mph)
  • With a destination in mind, cycling speeds are around 15 km/h (as opposed to casual cycling, which can be much slower)
  • Recreational swimming ranges somewhere between 1-5 km/h. World records are no faster than 9 km/h

Velocity Unit Conversion

Please see below to convert among various units for speed/velocity:


  1. Dr. Rowlett Unit Dictionary. (August 28, 2015). kilometer per hour (km/h) [Online], Available: