Multiply the MPH by 5,280 feet per mile ( the number of feet in a mile ). The result is feet per hour. Divide the speed in feet per hour by 3,600 seconds per hour. The result is feet per second.
Convert 3000 fps to mph
218 fps = 1486.36 mph
20 mph = 29.33... fps
170 times 3600 (secs in an hour) divided by 5280 (feet in a mile) 170 x 3600/5280 = 115.91 mph
60 mph = 88 fps (exactly)
3,600/5,280 gives you 1 fps in m.p.h Example: 52.8 f.p.s = 36 m.p.h.
By fps I assume it feet per second,hence 400fps=272.72727288 mph
15 fps (feet / second) = 10.23 mph
1 mph is 1.47 fps
280 x 3600/5280 = 190.91 mph
62 mph = 90.933... fps
10 fps = 6.82 mph (rounded)
103 mph = 151.067 fps
1,000 feet per second = about 681.8 mph
36.66666666 fps
299.93 fps.
222 feet per second is 151.364 mph