How many mph is 0.85 mach?

Answer 1

That all depends on the altitude the mach speed is occurring at. Mach 1 is defined as the speed of sound which is a function of fluid density.

In air at sea level and normal temperature, 0.85 mach = ~647 mph

0.85mach ~.(0.85*330)mph

Answer 2

It depends on the altitude, as velocity is dependent on on the speed of sound which varies at different altitudes. e.g. V = M*a, where 'a' is the speed of sound.

Answer 3

Mach 0.82 = 1,004.5 km/h

Answer 4

Mach 0.86 is 654.64 mph

Answer 5

Mach 0.85 is about 647 mph