# Speed of Sound to Mach Number Converter

Enter the speed in speed of sound below to get the value converted to Mach number.

## Result in Mach Number:

1 sound = Mach 1

Do you want to convert Mach number to speed of sound?

## How to Convert Speed of Sound to Mach Number

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

Mach number = speed of sound × 1

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

For example, here's how to convert 5 speed of sound to Mach number using the formula above.
5 sound = (5 × 1) = Mach 5

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

## What Is the 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,[1] 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.

## What Is 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.[2]

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 to Mach Conversion Table

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

## References

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