# Convert Kilometers Per Hour to Mach Number

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

**Results in Mach Number:**

## How to Convert Kilometers Per Hour to Mach Number

To convert a kilometer per hour measurement to a Mach measurement, multiply the speed by the conversion ratio. One kilometer per hour is equal to Mach 0.00081, so use this simple formula to convert:

The Mach number is equal to the speed in kilometers per hour multiplied by 0.00081.

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

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

## Kilometers Per Hour

Kilometers per hour are a measurement of speed expressing the distance travelled in kilometers in one hour.

The kilometer per hour, or kilometre per hour, is an SI unit of speed in the metric system. Kilometers per hour can be abbreviated as *km/h*, and are also sometimes abbreviated as *kph*. For example, 1 kilometer per hour can be written as 1 km/h or 1 kph.

Kilometers per hour can be expressed using the formula:

v_{km/s} = d_{km}t_{hr}

The velocity in kilometers per hour is equal to the distance in kilometers 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 |

## Kilometer Per Hour Measurements and Equivalent Mach Conversions

Kilometers Per Hour | Mach Number |
---|---|

1 km/h | Mach 0.00081 |

2 km/h | Mach 0.00162 |

3 km/h | Mach 0.00243 |

4 km/h | Mach 0.003239 |

5 km/h | Mach 0.004049 |

6 km/h | Mach 0.004859 |

7 km/h | Mach 0.005669 |

8 km/h | Mach 0.006479 |

9 km/h | Mach 0.007289 |

10 km/h | Mach 0.008098 |

11 km/h | Mach 0.008908 |

12 km/h | Mach 0.009718 |

13 km/h | Mach 0.010528 |

14 km/h | Mach 0.011338 |

15 km/h | Mach 0.012148 |

16 km/h | Mach 0.012958 |

17 km/h | Mach 0.013767 |

18 km/h | Mach 0.014577 |

19 km/h | Mach 0.015387 |

20 km/h | Mach 0.016197 |

21 km/h | Mach 0.017007 |

22 km/h | Mach 0.017817 |

23 km/h | Mach 0.018626 |

24 km/h | Mach 0.019436 |

25 km/h | Mach 0.020246 |

26 km/h | Mach 0.021056 |

27 km/h | Mach 0.021866 |

28 km/h | Mach 0.022676 |

29 km/h | Mach 0.023486 |

30 km/h | Mach 0.024295 |

31 km/h | Mach 0.025105 |

32 km/h | Mach 0.025915 |

33 km/h | Mach 0.026725 |

34 km/h | Mach 0.027535 |

35 km/h | Mach 0.028345 |

36 km/h | Mach 0.029155 |

37 km/h | Mach 0.029964 |

38 km/h | Mach 0.030774 |

39 km/h | Mach 0.031584 |

40 km/h | Mach 0.032394 |

## More Kilometer Per Hour Speed Conversions

- Convert to Knots
- 1 km/h is equal to 0.539957 knots
- Convert to Speed Of Sound
- 1 km/h is equal to 0.00081 speed of sound
- Convert to Speed Of Light
- 1 km/h is equal to 9.2657E-10 speed of light
- Convert to Miles Per Hour
- 1 km/h is equal to 0.621371 miles per hour
- Convert to Feet Per Second
- 1 km/h is equal to 0.911344 feet per second
- Convert to Kilometers Per Second
- 1 km/h is equal to 0.000278 kilometers per second
- Convert to Meters Per Second
- 1 km/h is equal to 0.277778 meters per second
- Convert to Centimeters Per Second
- 1 km/h is equal to 27.777778 centimeters per second