# Convert Knots to Mach Number

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

**Results in Mach Number:**

## How to Convert Knots to Mach Number

To convert a knot measurement to a Mach measurement, multiply the speed by the conversion ratio. One knot is equal to Mach 0.0015, so use this simple formula to convert:

The Mach number is equal to the speed in knots multiplied by 0.0015.

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

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

## Knots

One knot is equal to a speed of one nautical mile per hour, or one minute of latitude per hour.

Knots can be abbreviated as *kn*, and are also sometimes abbreviated as *kt*. For example, 1 knot can be written as 1 kn or 1 kt.

## 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 |

## Knot Measurements and Equivalent Mach Conversions

Knots | Mach Number |
---|---|

1 kn | Mach 0.0015 |

2 kn | Mach 0.003 |

3 kn | Mach 0.0045 |

4 kn | Mach 0.005999 |

5 kn | Mach 0.007499 |

6 kn | Mach 0.008999 |

7 kn | Mach 0.010499 |

8 kn | Mach 0.011999 |

9 kn | Mach 0.013499 |

10 kn | Mach 0.014998 |

11 kn | Mach 0.016498 |

12 kn | Mach 0.017998 |

13 kn | Mach 0.019498 |

14 kn | Mach 0.020998 |

15 kn | Mach 0.022498 |

16 kn | Mach 0.023997 |

17 kn | Mach 0.025497 |

18 kn | Mach 0.026997 |

19 kn | Mach 0.028497 |

20 kn | Mach 0.029997 |

21 kn | Mach 0.031497 |

22 kn | Mach 0.032996 |

23 kn | Mach 0.034496 |

24 kn | Mach 0.035996 |

25 kn | Mach 0.037496 |

26 kn | Mach 0.038996 |

27 kn | Mach 0.040496 |

28 kn | Mach 0.041995 |

29 kn | Mach 0.043495 |

30 kn | Mach 0.044995 |

31 kn | Mach 0.046495 |

32 kn | Mach 0.047995 |

33 kn | Mach 0.049495 |

34 kn | Mach 0.050994 |

35 kn | Mach 0.052494 |

36 kn | Mach 0.053994 |

37 kn | Mach 0.055494 |

38 kn | Mach 0.056994 |

39 kn | Mach 0.058494 |

40 kn | Mach 0.059994 |

## More Knot Speed Conversions

- Convert to Speed Of Sound
- 1 kn is equal to 0.0015 speed of sound
- Convert to Speed Of Light
- 1 kn is equal to 1.716E-9 speed of light
- Convert to Miles Per Hour
- 1 kn is equal to 1.150779 miles per hour
- Convert to Feet Per Second
- 1 kn is equal to 1.68781 feet per second
- Convert to Kilometers Per Second
- 1 kn is equal to 0.000514 kilometers per second
- Convert to Kilometers Per Hour
- 1 kn is equal to 1.852 kilometers per hour
- Convert to Meters Per Second
- 1 kn is equal to 0.514444 meters per second
- Convert to Centimeters Per Second
- 1 kn is equal to 51.444444 centimeters per second