This calculator allows you to convert from Mach (20°C, 1 atm) to Centimeter/hour and in a reverse direction. To convert from Mach (20°C, 1 atm) to Centimeter/hour, enter the amount of Mach (20°C, 1 atm) into the first input and to convert from Centimeter/hour to Mach (20°C, 1 atm), enter the amount of Centimeter/hour into the second input.