Units of measurement
From value
To value
Calculations
Mach (Mach)
Kilometer per hour (km/h)
0
0123456789
Information
Mach (Mach)
Mach is a unit of speed based on the speed of sound in air. Mach 1 is equal to the speed of sound, which varies with air temperature (approximately 343 m/s at 20°C).
Kilometer per hour (km/h)
Kilometer per hour (km/h) is a unit of speed equal to one kilometer traveled per hour. It is commonly used to measure vehicle speeds.