How fast is mach two?

Answer 1

Mach one is the speed of sound, which is about 761.2 miles per hour (340.3 meters per second).

Mach two is twice the speed of sound, which is about 1,522.4 miles per hour (680.6 meters per second).

Answer 2

Mach 2 is twice the speed of sound, which is approximately 1,500 miles per hour or 2,414 kilometers per hour. This means that Mach 2 is roughly 1,000 miles per hour or 1,609 kilometers per hour.