Convert Mach to Knots

Enter the Mach number below to convert the speed to knots.

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Mach 1 = 666.738661 kn
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How to Convert Mach to Knots

Speedometers are used in vehicles to measure speed

To convert a Mach measurement to a knot measurement, multiply the Mach number by the conversion ratio. Mach 1 is equal to 666.738661 knots, so use this simple formula to convert:

knots = Mach number × 666.738661

The speed in knots is equal to the Mach number multiplied by 666.738661.

For example, here's how to convert Mach 2 to knots using the formula above.
Mach 2 = (2 × 666.738661) = 1,333.477322 kn

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

Mach

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

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 Measurements and Equivalent Knot Conversions

Common Mach values converted to the equivalent knot value
Mach Knots
Mach 1 666.74 kn
Mach 2 1,333 kn
Mach 3 2,000 kn
Mach 4 2,667 kn
Mach 5 3,334 kn
Mach 6 4,000 kn
Mach 7 4,667 kn
Mach 8 5,334 kn
Mach 9 6,001 kn
Mach 10 6,667 kn
Mach 11 7,334 kn
Mach 12 8,001 kn
Mach 13 8,668 kn
Mach 14 9,334 kn
Mach 15 10,001 kn
Mach 16 10,668 kn
Mach 17 11,335 kn
Mach 18 12,001 kn
Mach 19 12,668 kn
Mach 20 13,335 kn
Mach 21 14,002 kn
Mach 22 14,668 kn
Mach 23 15,335 kn
Mach 24 16,002 kn
Mach 25 16,668 kn
Mach 26 17,335 kn
Mach 27 18,002 kn
Mach 28 18,669 kn
Mach 29 19,335 kn
Mach 30 20,002 kn
Mach 31 20,669 kn
Mach 32 21,336 kn
Mach 33 22,002 kn
Mach 34 22,669 kn
Mach 35 23,336 kn
Mach 36 24,003 kn
Mach 37 24,669 kn
Mach 38 25,336 kn
Mach 39 26,003 kn
Mach 40 26,670 kn

More Mach Speed Conversions

Convert to Speed Of Sound
Mach 1 is equal to 1 speed of sound
Convert to Speed Of Light
Mach 1 is equal to 1.1441E-6 speed of light
Convert to Miles Per Hour
Mach 1 is equal to 767.269148 miles per hour
Convert to Feet Per Second
Mach 1 is equal to 1,125.33 feet per second
Convert to Kilometers Per Second
Mach 1 is equal to 0.343 kilometers per second
Convert to Kilometers Per Hour
Mach 1 is equal to 1,234.8 kilometers per hour
Convert to Meters Per Second
Mach 1 is equal to 343 meters per second
Convert to Centimeters Per Second
Mach 1 is equal to 34,300 centimeters per second