# Mach Number to Speed Of Sound Conversion

Enter the Mach number below to convert the speed to speed of sound.

Results in Speed Of Sound: Mach 1 = 1 sound

## How to Convert Mach Number to Speed Of Sound

To convert a Mach measurement to a speed of sound measurement, multiply the Mach number by the conversion ratio. Mach 1 is equal to 1 speed of sound, so use this simple formula to convert:

speed of sound = Mach number × 1

The speed in speed of sound is equal to the Mach number multiplied by 1.

For example, here's how to convert Mach 2 to speed of sound using the formula above.
Mach 2 = (2 × 1) = 2 sound

Mach number and speed of sound are both units used to measure speed. Keep reading to learn more about each unit of measure.

## Mach Number

Mach, sometimes also referred to as a Mach number, is the ratio of the speed of an object to the speed of sound.

Mach can be abbreviated as M, and is also sometimes abbreviated as Ma. For example, Mach 1 can be written as 1 M or 1 Ma.

Although Mach can be abbreviated M or Ma, the Mach number is typically expressed with the number after the unit name. For example, the expression Mach 3 is preferred rather than 3 Machs or 3 M.

The speed is classified as either subsonic, transonic, supersonic, or hypersonic depending on the Mach number.

Speed classifications for various mach numbers.
Speed Classification Mach Number
Subsonic Mach < 1.0
Transonic Mach = 1.0
Supersonic Mach > 1.0
Hypersonic Mach > 5.0

## Speed Of Sound

The speed of sound is the distance a sound wave travels through an elastic medium. The speed of sound through air at 20 °C is equal to 343 meters per second, or roughly 767 miles per hour.

Speed of sound can be abbreviated as sound; for example, 1 speed of sound can be written as 1 sound.

## Mach to Speed Of Sound Conversion Table

Mach numbers converted to speed of sound
Mach Number Speed Of Sound
Mach 0.25 0.25 sound
Mach 0.5 0.5 sound
Mach 0.75 0.75 sound
Mach 1 1 sound
Mach 1.5 1.5 sound
Mach 2 2 sound
Mach 2.5 2.5 sound
Mach 3 3 sound
Mach 3.5 3.5 sound
Mach 4 4 sound
Mach 4.5 4.5 sound
Mach 5 5 sound
Mach 5.5 5.5 sound
Mach 6 6 sound
Mach 6.5 6.5 sound
Mach 7 7 sound
Mach 7.5 7.5 sound
Mach 8 8 sound
Mach 8.5 8.5 sound
Mach 9 9 sound
Mach 9.5 9.5 sound
Mach 10 10 sound

## References

1. NASA, Mach Number, https://www.grc.nasa.gov/WWW/BGH/mach.html
2. CK-12, Speed of Sound, https://www.ck12.org/physics/speed-of-sound/lesson/Speed-of-Sound-MS-PS/