With this information, you can calculate the quantity of feet per second 12 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 12 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.04937365 times 12 knots.

Which is the same to say that 12 knots is 20.253718 feet per second.

Twelve knots equals to twenty feet per second. *Approximation

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