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The Mach number is a dimensionless number expressing the ratio of an object's speed to the speed of sound. Thus, one goes at Mach 1 when moving at the speed of sound, at Mach 2 when going twice as fast, etc.

Common conversions of speeds

Convert miles per hour into kilometers per hour - mph into km/h Convert kilometers per hour into meters per second - km/h into m/s Convert mach (speeds of sound) into kilometers per hour - Ma into km/h Convert knots into kilometers per hour - nd into km/h Convert feet per hour into kilometers per hour - ft/h into km/h
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