# Mach Number to Speed of Sound Converter

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

**Results in Speed of Sound:**

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

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

## 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.^{[1]}

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.

## 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,^{[2]} 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.

## Mach to Speed of Sound Conversion Table

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

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

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