With this information, you can calculate the quantity of feet per second 393 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 393 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.0015075924 times 393 knots.

Which is the same to say that 393 knots is 663.30927 feet per second.

Three hundred ninety-three knots equals to six hundred sixty-three feet per second. *Approximation

A foot per second is zero times three hundred ninety-three knots. *Approximation