Ft/sec=Miles(x5280 ft/mi)/hour(x3600 sec/hr)
3,600/5,280 gives you 1 fps in m.p.h Example: 52.8 f.p.s = 36 m.p.h.
Mph stands for miles per hour, which is a measurement of speed.
10 fps = 6.82 mph (rounded)
280 x 3600/5280 = 190.91 mph
1 mph is 1.47 fps
62 mph = 90.933... fps
103 mph = 151.067 fps
299.93 fps.
36.66666666 fps
222 feet per second is 151.364 mph
By fps I assume it feet per second,hence 400fps=272.72727288 mph
Convert 3000 fps to mph