With this information, you can calculate the quantity of feet per second 438 miles per hour is equal to.

¿What is the inverse calculation between 1 foot per second and 438 miles per hour?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.0015566625 times 438 miles per hour.

Which is the same to say that 438 miles per hour is 642.4 feet per second.

Four hundred thirty-eight miles per hour equals to six hundred forty-two feet per second. *Approximation

A foot per second is zero times four hundred thirty-eight miles per hour. *Approximation