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:
Do you want to convert Mach number to speed of sound?
How to Convert Speed of Sound to Mach Number
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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.
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.
Learn more about the speed of 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 Classification | Mach Number |
|---|---|
| Subsonic | Mach < 1.0 |
| Transonic | Mach = 1.0 |
| Supersonic | Mach > 1.0 |
| Hypersonic | Mach > 5.0 |
Learn more about Mach number.
Speed of Sound to Mach Conversion Table
| 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
- CK-12, Speed of Sound, https://www.ck12.org/physics/speed-of-sound/lesson/Speed-of-Sound-MS-PS/
- NASA, Mach Number, https://www.grc.nasa.gov/WWW/BGH/mach.html
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