With this information, you can calculate the quantity of feet per second 408 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 408 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.0014521662 times 408 knots.

Which is the same to say that 408 knots is 688.62642 feet per second.

Four hundred eight knots equals to six hundred eighty-eight feet per second. *Approximation

A foot per second is zero times four hundred eight knots. *Approximation