With this information, you can calculate the quantity of feet per minute 840 knots is equal to.

¿What is the inverse calculation between 1 foot per minute and 840 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per minute is 1.1755631e-05 times 840 knots.

Which is the same to say that 840 knots is 85065.617 feet per minute.

Eight hundred forty knots equals to eighty-five thousand sixty-five feet per minute. *Approximation

A foot per minute is one times eight hundred forty knots. *Approximation