# Convert Kilometers Per Second to Mach Number

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

**Results in Mach Number:**

## How to Convert Kilometers Per Second to Mach Number

To convert a kilometer per second measurement to a Mach measurement, multiply the speed by the conversion ratio. One kilometer per second is equal to Mach 2.915452, so use this simple formula to convert:

The Mach number is equal to the speed in kilometers per second multiplied by 2.915452.

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

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

## Kilometers Per Second

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

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

Kilometers per second can be expressed using the formula:

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

The velocity in kilometers per second is equal to the distance in kilometers divided by time in seconds.

## 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 Second Measurements and Equivalent Mach Conversions

Kilometers Per Second | Mach Number |
---|---|

1 km/s | Mach 2.9155 |

2 km/s | Mach 5.8309 |

3 km/s | Mach 8.7464 |

4 km/s | Mach 11.66 |

5 km/s | Mach 14.58 |

6 km/s | Mach 17.49 |

7 km/s | Mach 20.41 |

8 km/s | Mach 23.32 |

9 km/s | Mach 26.24 |

10 km/s | Mach 29.15 |

11 km/s | Mach 32.07 |

12 km/s | Mach 34.99 |

13 km/s | Mach 37.9 |

14 km/s | Mach 40.82 |

15 km/s | Mach 43.73 |

16 km/s | Mach 46.65 |

17 km/s | Mach 49.56 |

18 km/s | Mach 52.48 |

19 km/s | Mach 55.39 |

20 km/s | Mach 58.31 |

21 km/s | Mach 61.22 |

22 km/s | Mach 64.14 |

23 km/s | Mach 67.06 |

24 km/s | Mach 69.97 |

25 km/s | Mach 72.89 |

26 km/s | Mach 75.8 |

27 km/s | Mach 78.72 |

28 km/s | Mach 81.63 |

29 km/s | Mach 84.55 |

30 km/s | Mach 87.46 |

31 km/s | Mach 90.38 |

32 km/s | Mach 93.29 |

33 km/s | Mach 96.21 |

34 km/s | Mach 99.13 |

35 km/s | Mach 102.04 |

36 km/s | Mach 104.96 |

37 km/s | Mach 107.87 |

38 km/s | Mach 110.79 |

39 km/s | Mach 113.7 |

40 km/s | Mach 116.62 |

## More Kilometer Per Second Speed Conversions

- Convert to Knots
- 1 km/s is equal to 1,943.84 knots
- Convert to Speed Of Sound
- 1 km/s is equal to 2.915452 speed of sound
- Convert to Speed Of Light
- 1 km/s is equal to 3.3356E-6 speed of light
- Convert to Miles Per Hour
- 1 km/s is equal to 2,236.94 miles per hour
- Convert to Feet Per Second
- 1 km/s is equal to 3,280.84 feet per second
- Convert to Kilometers Per Hour
- 1 km/s is equal to 3,600 kilometers per hour
- Convert to Meters Per Second
- 1 km/s is equal to 1,000 meters per second
- Convert to Centimeters Per Second
- 1 km/s is equal to 100,000 centimeters per second