With this information, you can calculate the quantity of feet per second 665 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 665 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.00089095308 times 665 knots.

Which is the same to say that 665 knots is 1122.3936 feet per second.

Six hundred sixty-five knots equals to one thousand one hundred twenty-two feet per second. *Approximation

A foot per second is zero times six hundred sixty-five knots. *Approximation