Miles per hour (mph) to Mach (Ma) Conversion
Miles per hour
Miles per hour (mph) is the unit of speed used in road transport in the United States, United Kingdom, and a small number of other countries. One mile per hour equals approximately 1.60934 km/h or 0.44704 m/s. Speed limits on US interstate highways are commonly 65–75 mph, while the UK national speed limit is 70 mph.
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.
| Miles per hour (mph) | Mach (Ma) |
|---|---|
| 0.1 mph | 0.00013 Ma |
| 1 mph | 0.0013 Ma |
| 2 mph | 0.00261 Ma |
| 3 mph | 0.00391 Ma |
| 5 mph | 0.00652 Ma |
| 10 mph | 0.013 Ma |
| 20 mph | 0.0261 Ma |
| 30 mph | 0.0391 Ma |
| 50 mph | 0.0652 Ma |
| 100 mph | 0.1303 Ma |
| 1000 mph | 1.3033 Ma |
Frequently Asked Questions (FAQ)
How many Mach are in 1 miles per hour?
1 miles per hour (mph) is exactly 0.001303 Mach (Ma).
How do I convert miles per hour to Mach?
Multiply the value in miles per hour by 0.001303 to get the result in Mach. Or use the converter above — type any number and see the result instantly.