With this information, you can calculate the quantity of feet per second 657 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 657 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.00090180183 times 657 knots.

Which is the same to say that 657 knots is 1108.8911 feet per second.

Six hundred fifty-seven knots equals to one thousand one hundred eight feet per second. *Approximation

A foot per second is zero times six hundred fifty-seven knots. *Approximation