How many mph is mach 4?

Hi

how fast is Mach 2, 3, 5, 10, or any other value besides Mach 1 at a given altitude. So how fast is Mach 4 in miles per hour.

First what is Mach 1 it really comes down to a matter of opinion. It is for this reason that you find such an even divide between sites that assume a value of 761 mph for mach 1 versus those assuming 742 mph. I would argue that 761 mph is the more accurate value since it is derived from the standard atmosphere. The standard atmosphere was developed for engineers who need a universally accepted reference for calculating atmospheric properties. These properties are critical in designing aircraft and predicting how they perform, so it is important for all designers to use the same reference.

So it may be acceptable to calculate that mach 4 is 761mph multiplied by 4 which comes out at 3,044mph.

I hope this helped.