Mach to Knots Converter
Convert Mach (at 343 m/s) (Mach) to knots (kn), with the formula, a conversion table and exact factors.
Change the values and press Calculate to work out your own figures.
Enter a speed, choose its unit and the unit you want. The answer is exact until it is shown, and the same value appears in every other unit.
Show the working
- 1 Mach = 666.738660907 kn
- 1 × 666.738660907 = 666.738660907 kn
How to convert mach to knots
1 Mach = 666.738660907 kn, so multiply by 666.738660907 to go from Mach (at 343 m/s) to knots. Going the other way, 1 kn = 0.00149983803045 Mach.
kn = Mach × 666.738660907 Mach = kn × 0.00149983803045
Worked example:
1 Mach = 666.738660907 kn 5 × 666.738660907 = 3333.69330454 kn
Mach to knots table
| Mach | Knots |
|---|---|
| 1 Mach | 666.738660907 kn |
| 2 Mach | 1,333.47732181 kn |
| 3 Mach | 2,000.21598272 kn |
| 4 Mach | 2,666.95464363 kn |
| 5 Mach | 3,333.69330454 kn |
| 6 Mach | 4,000.43196544 kn |
| 7 Mach | 4,667.17062635 kn |
| 8 Mach | 5,333.90928726 kn |
| 9 Mach | 6,000.64794816 kn |
| 10 Mach | 6,667.38660907 kn |
| 15 Mach | 10,001.0799136 kn |
| 20 Mach | 13,334.7732181 kn |
| 25 Mach | 16,668.4665227 kn |
| 30 Mach | 20,002.1598272 kn |
| 40 Mach | 26,669.5464363 kn |
| 50 Mach | 33,336.9330454 kn |
| 75 Mach | 50,005.399568 kn |
| 100 Mach | 66,673.8660907 kn |
| 250 Mach | 166,684.665227 kn |
| 500 Mach | 333,369.330454 kn |
| 1000 Mach | 666,738.660907 kn |
About the units
- Mach (Mach)
- Mach (at 343 m/s), a specialised unit. Mach 1 is the local speed of sound, which depends on air temperature; this converter uses 343 m/s (dry air at 20 °C). In the standard sea-level atmosphere (15 °C) it is 340.3 m/s. Definition: Speed of sound in dry air at 20 °C: 343 m/s (NASA Glenn Research Center).
- Knots (kn)
- Knots, a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.