Kilometre per second is speed unit, symbol: [km/s]. Definition of 1 kilometre per second ≡ 1 km / 1 s. The speed with which the body moves 1 km in 1 second. The Earth's circulation speed is about 30 km/s.. Compared to metre per second, kilometre per second is bigger unit.
• 1 [km/s] = (exactly) `1000` [m/s]
• 1 [m/s] = (exactly) `1/(1000)` [km/s] = 0.001 [km/s]
Multiply convert of kilometre per second to common speed units:[km/s]
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See also: kilometre length unit. http://conversion.org/length/k...