The speed of an object is the magnitude of its velocity, the rate of change of its position; it is thus a scalar quantity. The SI unit of speed is the meter per second (m/s), but the most common unit of speed in everyday usage is the kilometer per hour (km/h)or, in the US and the UK, miles per hour (mi/h). This Speed converter allows you to convert centimeter/hour (cm/h), centimeter/minute (cm/min), centimeter/second (cm/s), Cosmic velocity – first, Cosmic velocity – second, Cosmic velocity – third, Earth's velocity, foot/hour (ft/h), foot/minute (ft/min), foot/second (ft/s), kilometer/hour (km/h), kilometer/minute (km/min), kilometer/second (km/s), knot (kt, kn), Mach (15°C), meter/hour (m/h), meter/minute (m/min), meter/second (m/s), mile/hour (mi/h), mile/minute (mi/min), mile/second (mi/s), millimeter/hour (mm/h), millimeter/minute (mm/min) among other units related to Speed.