What is a mach?

Definition

Ma

Mach (Ma) expresses speed as a ratio to the speed of sound (~343 m/s at sea level), used in aviation and aerospace.

Unit system

Scientific

Convert mach

Meters per Second → Mach Km/h → Mach Mph → Mach Feet per Second → Mach Knots → Mach Mach → Meters per Second Mach → Km/h Mach → Mph

All speed units

Unit	Symbol	System
meters per second	m/s	Metric
kilometers per hour	km/h	Metric
miles per hour	mph	Imperial / US
feet per second	ft/s	Imperial / US
knots	kn	Nautical & Aviation
mach	Ma	Scientific