Knots (kn) to Mach (Ma) Conversion
Knots
The knot is a unit of speed equal to exactly one nautical mile per hour (1.852 km/h), the standard unit for maritime and aerial navigation worldwide. Its name derives from the historical practice of measuring ship speed using a knotted rope thrown overboard. Because the nautical mile is tied to the Earth's geometry (one arcminute of latitude), a ship at 1 knot crosses one arcminute of latitude per hour.
Mach
The Mach number represents the ratio of an object's speed to the local speed of sound. Mach 1 is approximately 343 m/s (1,235 km/h) at sea level and 20 °C, but varies with temperature and altitude. Named after Austrian physicist Ernst Mach, the Mach number is fundamental in aerodynamics: subsonic is below Mach 0.8, supersonic from Mach 1.2 to 5, and hypersonic above Mach 5.
| Knots (kn) | Mach (Ma) |
|---|---|
| 0.1 kn | 0.00015 Ma |
| 1 kn | 0.0015 Ma |
| 2 kn | 0.003 Ma |
| 3 kn | 0.0045 Ma |
| 5 kn | 0.0075 Ma |
| 10 kn | 0.015 Ma |
| 20 kn | 0.03 Ma |
| 30 kn | 0.045 Ma |
| 50 kn | 0.075 Ma |
| 100 kn | 0.15 Ma |
| 1000 kn | 1.4998 Ma |
Frequently Asked Questions (FAQ)
How many Mach are in 1 knots?
1 knots (kn) is exactly 0.0015 Mach (Ma).
How do I convert knots to Mach?
Multiply the value in knots by 0.0015 to get the result in Mach. Or use the converter above — type any number and see the result instantly.