Speed Converter From To meter/second [m/s] kilometer/hour [km/h] mile/hour [mi/h] meter/hour [m/h] meter/minute [m/min] kilometer/minute [km/min] kilometer/second [km/s] centimeter/hour [cm/h] centimeter/minute [cm/min] centimeter/second [cm/s] millimeter/hour [mm/h] millimeter/minute [mm/min] millimeter/second [mm/s] foot/hour [ft/h] foot/minute [ft/min] foot/second [ft/s] yard/hour [yd/h] yard/minute [yd/min] yard/second [yd/s] mile/minute [mi/min] mile/second [mi/s] knot [kt, kn] knot (UK) [kt (UK)] Velocity of light in vacuum Cosmic velocity – first Cosmic velocity – second Cosmic velocity – third Earth’s velocity Velocity of sound in pure water Velocity of sound in sea water (20°C, 10 meter deep) Mach (20°C, 1 atm) Mach (SI standard) meter/second [m/s] kilometer/hour [km/h] mile/hour [mi/h] meter/hour [m/h] meter/minute [m/min] kilometer/minute [km/min] kilometer/second [km/s] centimeter/hour [cm/h] centimeter/minute [cm/min] centimeter/second [cm/s] millimeter/hour [mm/h] millimeter/minute [mm/min] millimeter/second [mm/s] foot/hour [ft/h] foot/minute [ft/min] foot/second [ft/s] yard/hour [yd/h] yard/minute [yd/min] yard/second [yd/s] mile/minute [mi/min] mile/second [mi/s] knot [kt, kn] knot (UK) [kt (UK)] Velocity of light in vacuum Cosmic velocity – first Cosmic velocity – second Cosmic velocity – third Earth’s velocity Velocity of sound in pure water Velocity of sound in sea water (20°C, 10 meter deep) Mach (20°C, 1 atm) Mach (SI standard)