Derived unit

Derived unit

Measurement unit for a derived quantity.


  • The metre per second, symbol m/s, and the centimeter per second, symbol cm/s, are derived units of speed in the SI.
  • The kilometre per hour, symbol km/h, is a unit of speed outside the SI but accepted for use with the SI.
  • The knot, equal to one nautical mile per hour, is a unit of speed outside the SI.  

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