How to convert mach to knots
To convert a measurement in mach to knots, multiply the value by 661.470842. The conversion factor comes from the relationship between both units and the meter per second.
For example, to convert 5 Ma to knots: 5 × 661.470842 = 3,307.3542 kn.
What is a mach?
Mach is the ratio of an object's speed to the local speed of sound. Mach 1 at sea level and 15°C is about 340.29 meters per second. Named after physicist Ernst Mach, the Mach number became essential in aeronautics as aircraft approached and exceeded the speed of sound in the mid-20th century.
Common uses of mach include: Aircraft and jet speed ratings; Aerodynamics and wind-tunnel testing; Supersonic and hypersonic research; Missile and projectile speed specs.
What is a knot?
A knot is a unit of speed equal to one nautical mile per hour, or exactly 1.852 km/h (about 0.514 m/s). The knot dates from the age of sail, when speed was measured by counting knots on a rope paid out behind a ship over a timed interval. It remains standard in marine and air navigation.
Common uses of knots include: Maritime navigation and ship speed; Aviation airspeed and ground speed; Wind speed in marine forecasts; Ocean current measurements.
Mach to knots worked examples
Here are some common values converted:
1 Ma = 661.470842 kn 5 Ma = 3,307.3542 kn 10 Ma = 6,614.7084 kn 50 Ma = 33,073.5421 kn 100 Ma = 66,147.0842 kn
Frequently asked questions
How many knots are in one mach?
One mach (Ma) equals 661.470842 knots (kn). Multiply any value in mach by 661.470842 to convert to knots.
How do I convert mach to knots?
Multiply the value in mach by 661.470842. For example, 5 Ma × 661.470842 = 3,307.3542 kn.
How do I convert knots to mach?
Multiply the value in knots by 0.001511782434, or divide by 661.470842. Use the swap button on the converter above to reverse the direction.
Is the mach to knot conversion exact?
Conversions between m/s, km/h, mph, knots and ft/s are exact by definition. Mach uses the speed of sound at sea level and 15°C (340.29 m/s), which varies with temperature and altitude.
What is the formula for mach to knots?
The formula is: kn = Ma × 661.470842. This comes from the definition of both units relative to the meter per second.