Mach (Ma) to Speed of light (c) Conversion
Mach
The Mach number represents the ratio of an object's speed to the local speed of sound. Mach 1 is approximately 343 m/s (1,235 km/h) at sea level and 20 °C, but varies with temperature and altitude. Named after Austrian physicist Ernst Mach, the Mach number is fundamental in aerodynamics: subsonic is below Mach 0.8, supersonic from Mach 1.2 to 5, and hypersonic above Mach 5.
Speed of light
The speed of light in a vacuum (c) is exactly 299,792,458 metres per second — a fundamental constant of nature and the ultimate speed limit of the universe. It is the basis of Einstein's Special Theory of Relativity, which establishes that no object with mass can reach or exceed this speed. The definition of the metre itself is anchored to c: one metre is the distance light travels in 1/299,792,458 of a second.
| Mach (Ma) | Speed of light (c) |
|---|---|
| 0.1 Ma | 0.000000114 c |
| 1 Ma | 0.00000114 c |
| 2 Ma | 0.00000229 c |
| 3 Ma | 0.00000343 c |
| 5 Ma | 0.00000572 c |
| 10 Ma | 0.0000114 c |
| 20 Ma | 0.0000229 c |
| 30 Ma | 0.0000343 c |
| 50 Ma | 0.0000572 c |
| 100 Ma | 0.000114 c |
| 1000 Ma | 0.00114 c |
Frequently Asked Questions (FAQ)
How many speed of light are in 1 Mach?
1 Mach (Ma) is exactly 0.00000114 speed of light (c).
How do I convert Mach to speed of light?
Multiply the value in Mach by 0.00000114 to get the result in speed of light. Or use the converter above — type any number and see the result instantly.