A Mach number is a dimensionless quantity representing the ratio of speed of an object moving through a fluid and the local speed of sound. A Mach number varies by the composition of the surrounding medium and also by local conditions, especially temperature and pressure. As such, it cannot be quantified to a particular speed.
As a very rough estimate, use 760 mph.
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How fast is 0.85 mach?
Mach 1 is 761.21 mph.Use this equation to convert Mach to miles per hour: mach x 761.21 = mph
About 25.3 miles per hour.
Mach 2.34 is equal to 2445 KM/HR or 1548 MPH.
2.5 miles per hour equates to 4.02 kilometers per hour.