Mach Number to Knots Converter
CommonMeters per second, km/h, mph and more.
How to convert Mach Number to Knots
Multiply the mach number value by 666.739: 1 M = 666.739 kn. Going the other way, 1 kn = 0.00149984 M, so divide by 666.739 or use the Knots to Mach Number converter.
About these units
Mach Number (M)
Mach number is speed divided by the local speed of sound; this converter uses 343 m/s, the value in air at 20 °C. Mach 1 at sea level is therefore about 1,235 km/h.
Knots (kn)
A knot is one nautical mile per hour, exactly 1.852 km/h or about 1.151 mph. Ship and aircraft speeds and wind speeds at sea are given in knots.
Mach Number to Knots conversion table
| Mach Number (M) | Knots (kn) |
|---|---|
| 1 M | 666.739 kn |
| 2 M | 1,333.48 kn |
| 3 M | 2,000.22 kn |
| 4 M | 2,666.96 kn |
| 5 M | 3,333.7 kn |
| 10 M | 6,667.39 kn |
| 20 M | 13,334.8 kn |
| 25 M | 16,668.5 kn |
| 50 M | 33,337 kn |
| 100 M | 66,673.9 kn |
| 500 M | 333,370 kn |
| 1,000 M | 666,739 kn |
More mach number conversions
- Mach Number to Speed of Light1 M = 1.1441e-6 c
- Mach Number to Speed of Sound Air1 M = 1 Mach 1
- Mach Number to Meters per Second1 M = 343 m/s
- Mach Number to Miles per Hour1 M = 767.269 mph
- Mach Number to Centimeters per Second1 M = 34,300 cm/s
- Mach Number to Kilometers per Second1 M = 0.343 km/s
See every unit on the Speed Converter.