What is kilometre per hour?

Kilometre per hour is a unit of speed equal to one kilometre travelled in one hour. It is the most widely used unit for road speed limits, vehicle speedometers, and wind speeds in metric countries.

What is kilometre per second?

Kilometre per second is a unit of speed equal to 1,000 metres per second. It is used in astrophysics, rocket propulsion, and the measurement of planetary and cosmic velocities.

Worked examples

1 kilometre per hour = 0.00027778 kilometre per second

1 kilometre per second = 1,000 metre per second

More Speed conversions

• Convert kilometre per hour to metre per second
• Convert kilometre per hour to mile per hour
• Convert kilometre per hour to knot
• Convert kilometre per hour to foot per second
• Convert kilometre per hour to metre per minute
• Convert kilometre per hour to kilometre per second
• Convert kilometre per hour to mach (approx at sea level)
• Convert kilometre per hour to centimetre per second
• Convert kilometre per hour to mile per minute

Assumption: Mach uses an approximate sea-level reference (about 340.29 m/s).