# Convert Miles Per Hour to Mach Number

Enter the speed in miles per hour below to get the value converted to Mach number.

**Results in Mach Number:**

## How to Convert Miles Per Hour to Mach Number

To convert a mile per hour measurement to a Mach measurement, multiply the speed by the conversion ratio. One mile per hour is equal to Mach 0.001303, so use this simple formula to convert:

The Mach number is equal to the speed in miles per hour multiplied by 0.001303.

**For example,**here's how to convert 5 miles per hour to Mach number using the formula above.

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

## Miles Per Hour

Miles per hour are a measurement of speed expressing the distance travelled in miles in one hour.

The mile per hour is a US customary and imperial unit of speed. Miles per hour can be abbreviated as *mph*, and are also sometimes abbreviated as *mi/h* or *MPH*. For example, 1 mile per hour can be written as 1 mph, 1 mi/h, or 1 MPH.

Miles per hour can be expressed using the formula:

v_{mph} = d_{mi}t_{hr}

The velocity in miles per hour is equal to the distance in miles divided by time in hours.

## 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 Classification | Mach Number |
---|---|

Subsonic | Mach < 1.0 |

Transonic | Mach = 1.0 |

Supersonic | Mach > 1.0 |

Hypersonic | Mach > 5.0 |

## Mile Per Hour Measurements and Equivalent Mach Conversions

Miles Per Hour | Mach Number |
---|---|

1 mph | Mach 0.001303 |

2 mph | Mach 0.002607 |

3 mph | Mach 0.00391 |

4 mph | Mach 0.005213 |

5 mph | Mach 0.006517 |

6 mph | Mach 0.00782 |

7 mph | Mach 0.009123 |

8 mph | Mach 0.010427 |

9 mph | Mach 0.01173 |

10 mph | Mach 0.013033 |

11 mph | Mach 0.014337 |

12 mph | Mach 0.01564 |

13 mph | Mach 0.016943 |

14 mph | Mach 0.018247 |

15 mph | Mach 0.01955 |

16 mph | Mach 0.020853 |

17 mph | Mach 0.022157 |

18 mph | Mach 0.02346 |

19 mph | Mach 0.024763 |

20 mph | Mach 0.026066 |

21 mph | Mach 0.02737 |

22 mph | Mach 0.028673 |

23 mph | Mach 0.029976 |

24 mph | Mach 0.03128 |

25 mph | Mach 0.032583 |

26 mph | Mach 0.033886 |

27 mph | Mach 0.03519 |

28 mph | Mach 0.036493 |

29 mph | Mach 0.037796 |

30 mph | Mach 0.0391 |

31 mph | Mach 0.040403 |

32 mph | Mach 0.041706 |

33 mph | Mach 0.04301 |

34 mph | Mach 0.044313 |

35 mph | Mach 0.045616 |

36 mph | Mach 0.04692 |

37 mph | Mach 0.048223 |

38 mph | Mach 0.049526 |

39 mph | Mach 0.05083 |

40 mph | Mach 0.052133 |

## More Mile Per Hour Speed Conversions

- Convert to Knots
- 1 mph is equal to 0.868976 knots
- Convert to Speed Of Sound
- 1 mph is equal to 0.001303 speed of sound
- Convert to Speed Of Light
- 1 mph is equal to 1.4912E-9 speed of light
- Convert to Feet Per Second
- 1 mph is equal to 1.466667 feet per second
- Convert to Kilometers Per Second
- 1 mph is equal to 0.000447 kilometers per second
- Convert to Kilometers Per Hour
- 1 mph is equal to 1.609344 kilometers per hour
- Convert to Meters Per Second
- 1 mph is equal to 0.44704 meters per second
- Convert to Centimeters Per Second
- 1 mph is equal to 44.704 centimeters per second