Knots to Mach Converter
Convert knots (kn) to Mach (at 343 m/s) (Mach), 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 kn = 0.00149983803045 Mach
- 1 × 0.00149983803045 = 0.00149983803045 Mach
How to convert knots to mach
1 kn = 0.00149983803045 Mach, so multiply by 0.00149983803045 to go from knots to Mach (at 343 m/s). Going the other way, 1 Mach = 666.738660907 kn.
Mach = kn × 0.00149983803045 kn = Mach × 666.738660907
Worked example:
1 kn = 0.00149983803045 Mach 5 × 0.00149983803045 = 0.00749919015225 Mach
Knots to mach table
| Knots | Mach |
|---|---|
| 1 kn | 0.00149983803045 Mach |
| 2 kn | 0.0029996760609 Mach |
| 3 kn | 0.00449951409135 Mach |
| 4 kn | 0.0059993521218 Mach |
| 5 kn | 0.00749919015225 Mach |
| 6 kn | 0.0089990281827 Mach |
| 7 kn | 0.0104988662132 Mach |
| 8 kn | 0.0119987042436 Mach |
| 9 kn | 0.0134985422741 Mach |
| 10 kn | 0.0149983803045 Mach |
| 15 kn | 0.0224975704568 Mach |
| 20 kn | 0.029996760609 Mach |
| 25 kn | 0.0374959507613 Mach |
| 30 kn | 0.0449951409135 Mach |
| 40 kn | 0.059993521218 Mach |
| 50 kn | 0.0749919015225 Mach |
| 75 kn | 0.112487852284 Mach |
| 100 kn | 0.149983803045 Mach |
| 250 kn | 0.374959507613 Mach |
| 500 kn | 0.749919015225 Mach |
| 1000 kn | 1.49983803045 Mach |
About the units
- Knots (kn)
- Knots, a specialised unit. Definition: NIST SP 811 Appendix B.8, factors for units listed alphabetically.
- 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).