Mach to Speed of Light Converter
Convert Mach (at 343 m/s) (Mach) to speed of light (c), 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 = 1.14412484653e-6 c
- 1 × 1.14412484653e-6 = 1.14412484653e-6 c
How to convert mach to speed of light
1 Mach = 1.14412484653 × 10⁻⁶ c, so multiply by 1.14412484653 to go from Mach (at 343 m/s) to speed of light. Going the other way, 1 c = 874,030.489796 Mach.
c = Mach × 1.14412484653 Mach = c × 874,030.489796
Worked example:
1 Mach = 1.14412484653e-6 c 5 × 1.14412484653e-6 = 5.72062423265e-6 c
Mach to speed of light table
| Mach | Speed of Light |
|---|---|
| 1 Mach | 1.14412484653 × 10⁻⁶ c |
| 2 Mach | 2.28824969306 × 10⁻⁶ c |
| 3 Mach | 3.43237453959 × 10⁻⁶ c |
| 4 Mach | 4.57649938612 × 10⁻⁶ c |
| 5 Mach | 5.72062423265 × 10⁻⁶ c |
| 6 Mach | 6.86474907918 × 10⁻⁶ c |
| 7 Mach | 8.00887392571 × 10⁻⁶ c |
| 8 Mach | 9.15299877224 × 10⁻⁶ c |
| 9 Mach | 1.02971236188 × 10⁻⁵ c |
| 10 Mach | 1.14412484653 × 10⁻⁵ c |
| 15 Mach | 1.71618726979 × 10⁻⁵ c |
| 20 Mach | 2.28824969306 × 10⁻⁵ c |
| 25 Mach | 2.86031211632 × 10⁻⁵ c |
| 30 Mach | 3.43237453959 × 10⁻⁵ c |
| 40 Mach | 4.57649938612 × 10⁻⁵ c |
| 50 Mach | 5.72062423265 × 10⁻⁵ c |
| 75 Mach | 8.58093634897 × 10⁻⁵ c |
| 100 Mach | 0.000114412484653 c |
| 250 Mach | 0.000286031211632 c |
| 500 Mach | 0.000572062423265 c |
| 1000 Mach | 0.00114412484653 c |
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).
- Speed of Light (c)
- Speed of light, a specialised unit. Definition: BIPM SI Brochure, 9th edition (SI units, prefixes and units accepted for use with the SI).