How Fast Is a 40-Yard Dash in Mph?

If you have a 40-yard dash time, divide it into 80 to get an approximate miles per hour speed. So, if you have a 5 second 40-yard dash, you are going about 16 mph.

Is a 5 second 40 slow?

If you can't dunk, the odds of you running a sub 5.0 forty are pretty much zero. It requires the same kind of fast-twitch muscles.) We rarely see any football player voluntarily admit to running over a 5.0 forty because doing so means they're slow.

Is a 4.7 40 fast?

What people tend to forget is that a 40-yard dash time of 4.5 or even 4.6 seconds is blistering fast. "If you have a kid that runs a legit 4.5 then he's plenty fast enough to play Division I football," the coach from the SEC said. "That's still a very fast time - even for running backs."