4000 feet per second equals how many mph?

4000 fps / 5280 feet per mile = .7575 miles per second

.7575 mps X 3600 seconds per hour = 2727.27 mph

Hilarious! So 4000 feet per minute translates to five times the speed of sound. Sorry. It's 45 mph.

BOTH OF YOU ARE WRONG ITS ACTUALLY 272 MPH

no wait your not wrong i forgot one zero so the first answer is correct

its 2727 mph