Miles per Hour to Mach Converter
Convert miles per hour (mph) 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 mph = 0.00130332361516 Mach
- 1 × 0.00130332361516 = 0.00130332361516 Mach
How to convert miles per hour to mach
1 mph = 0.00130332361516 Mach, so multiply by 0.00130332361516 to go from miles per hour to Mach (at 343 m/s). Going the other way, 1 Mach = 767.269148175 mph.
Mach = mph × 0.00130332361516 mph = Mach × 767.269148175
Worked example:
1 mph = 0.00130332361516 Mach 5 × 0.00130332361516 = 0.0065166180758 Mach
Miles per Hour to mach table
| Miles per Hour | Mach |
|---|---|
| 1 mph | 0.00130332361516 Mach |
| 2 mph | 0.00260664723032 Mach |
| 3 mph | 0.00390997084548 Mach |
| 4 mph | 0.00521329446064 Mach |
| 5 mph | 0.0065166180758 Mach |
| 6 mph | 0.00781994169096 Mach |
| 7 mph | 0.00912326530612 Mach |
| 8 mph | 0.0104265889213 Mach |
| 9 mph | 0.0117299125364 Mach |
| 10 mph | 0.0130332361516 Mach |
| 15 mph | 0.0195498542274 Mach |
| 20 mph | 0.0260664723032 Mach |
| 25 mph | 0.032583090379 Mach |
| 30 mph | 0.0390997084548 Mach |
| 40 mph | 0.0521329446064 Mach |
| 50 mph | 0.065166180758 Mach |
| 75 mph | 0.097749271137 Mach |
| 100 mph | 0.130332361516 Mach |
| 250 mph | 0.32583090379 Mach |
| 500 mph | 0.65166180758 Mach |
| 1000 mph | 1.30332361516 Mach |
About the units
- Miles per Hour (mph)
- Miles per hour, a US customary unit. Definition: NIST Handbook 44 (2024), Appendix C: General Tables of Units of Measurement.
- 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).