Convert from mach to kilometer/hour

Unit Definition (mach)
The Mach is a measure of velocity relative to the speed of sound. The precise speed of sound varies with the density and temperature of the atmosphere, although at 0 °C (at 1atm.) the speed of sound is 331.6 m/s. The mach speed is important to the control of an aircraft, especially at speeds close to or exceeding Mach 1.0. The unit is named after the Austrian physicist Ernst Mach.

Unit Definition (kilometer/hour)
The kilometer/hour (km/h) is the most common metric unit of speed or velocity. It simply means that something travelling at a constant speed of 1km/h will move a distance of exactly 1 kilometer in 1 hour. The correct symbol for this unit is km/h.