Convert Mach (speed of sound) to Knots (kn)
Enter a value below to convert Mach (speed of sound) to Knots (kn).
Conversion:
1 Mach (speed of sound) = 666.73923692 Knots (kn)
How to Convert Mach (speed of sound) to Knots (kn)
1 mach = 666.73923692 kn
1 kn = 0.0014998367347 mach
Example: convert 15 Mach (speed of sound) to Knots (kn):
25 mach = 16668.480923 kn
Mach (speed of sound) to Knots (kn) Conversion Table
| Mach (speed of sound) | Knots (kn) |
|---|---|
| 0.01 mach | 6.6673923692 kn |
| 0.1 mach | 66.673923692 kn |
| 1 mach | 666.73923692 kn |
| 2 mach | 1333.4784738 kn |
| 3 mach | 2000.2177108 kn |
| 5 mach | 3333.6961846 kn |
| 10 mach | 6667.3923692 kn |
| 20 mach | 13334.784738 kn |
| 50 mach | 33336.961846 kn |
| 100 mach | 66673.923692 kn |
| 1000 mach | 666739.23692 kn |
Mach (speed of sound)
Definition
Mach is a dimensionless unit representing the ratio of an object's speed to the local speed of sound. Mach 1 equals the speed of sound (approximately 343 m/s or 1,235 km/h at sea level in standard conditions).
History
The Mach number was named after Ernst Mach, an Austrian physicist who studied supersonic motion in the 19th century. It became critical during World War II and the subsequent development of jet and rocket aircraft.
Current use
Mach numbers are essential in aerospace engineering, military aviation, and supersonic transport. Fighter jets, commercial aircraft approaching transonic speeds, and spacecraft re-entry velocities are all described using Mach.
Knots (kn)
Definition
A knot (kn) is a unit of speed equal to one nautical mile per hour (approximately 1.852 km/h or 1.151 mph). It is derived from maritime navigation practices.
History
The knot originated from a 17th-century method of measuring ship speed by counting knots on a rope paid out over a fixed time from a 'chip log'. The practice gave rise to the unit name that persists today.
Current use
Knots are the standard speed unit in maritime and aviation navigation worldwide. Air traffic control, ship navigation, weather reports for marine and aviation use, and ocean current speeds all use knots.