# Speed of Sound to Mach Number Converter

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

**Results in Mach Number:**

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:

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.

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

## More Speed of Sound & Mach Conversions

- speed of sound to knots
- speed of sound to speed of light
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- speed of sound to kilometers per hour
- speed of sound to meters per second
- speed of sound to centimeters per second
- knots to Mach number
- speed of light to Mach number
- miles per hour to Mach number
- feet per second to Mach number
- kilometers per second to Mach number
- kilometers per hour to Mach number
- meters per second to Mach number
- centimeters per second to Mach number