Units of measurement
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Calculations
Kilometer per second (km/s)
Millimeter per second (mm/s)
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Information
Kilometer per second (km/s)
Kilometer per second (km/s) is a unit of speed equal to one kilometer traveled per second. It is used in astronomy and high-speed research.
Millimeter per second (mm/s)
Millimeter per second (mm/s) is a unit of speed equal to one millimeter traveled per second. It is used for measuring small speeds in engineering and science.