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Glossary Science & Engineering

Speed

Speed is distance travelled divided by the time taken: `speed = distance / time`.

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In more detail

100 km in 1 hour is 100 km/h, which is 62.14 mph or 27.78 m/s. To convert km/h to m/s divide by 3.6; to convert km/h to mph divide by 1.609.

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Speed Calculator

Calculate speed from distance and time, with instant results in mph, km/h, m/s, and knots.

See also

  • Glossary Running pace
    Pace is the time taken to cover a distance unit, such as minutes per kilometre or per mile, the reciprocal of speed.
  • Glossary Horsepower
    Horsepower is a unit of power; one mechanical horsepower is 33,000 foot-pounds of work per minute, about 745.7 watts.
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