With this information, you can calculate the quantity of feet per second 13 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 13 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.045575677 times 13 knots.

Which is the same to say that 13 knots is 21.941528 feet per second.

Thirteen knots equals to twenty-one feet per second. *Approximation

A foot per second is zero times thirteen knots. *Approximation