Feet per Second to Speed of Sound Converter

How to Convert

To convert feet per second (ft/s) to speed of sound (Mach), multiply the speed by 0.000889. This conversion factor is based on the speed of sound in air at sea level at 20°C (68°F), which is approximately 1,125 feet per second.

Formula

Speed of Sound (Mach) = Feet per Second × 0.000889

Common Values

• • 1,125 ft/s = 1 Mach (speed of sound)
• • 2,250 ft/s = 2 Mach (twice the speed of sound)
• • 562.5 ft/s = 0.5 Mach (half the speed of sound)