Units of measurement
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Calculations
Meilen pro Stunde (mph)
Mach (Mach)
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Information
Meilen pro Stunde (mph)
Mile per hour (mph) is a unit of speed equal to one mile traveled per hour. It is used in the United States and the United Kingdom to measure vehicle and aircraft speeds.
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).