Convert Knots to Mach Number

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

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1 kn = Mach 0.0015

How to Convert Knots to Mach Number

Speedometers are used in vehicles to measure speed

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:

Mach number = knots × 0.0015

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.
5 kn = (5 × 0.0015) = Mach 0.007499

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 classifications for various mach numbers.
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

Common knot values converted to the equivalent Mach value
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