With this information, you can calculate the quantity of feet per second 561 knots is equal to.

¿What is the inverse calculation between 1 foot per second and 561 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per second is 0.0010561209 times 561 knots.

Which is the same to say that 561 knots is 946.86133 feet per second.

Five hundred sixty-one knots equals to nine hundred forty-six feet per second. *Approximation

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