With this information, you can calculate the quantity of feet per minute 661 knots is equal to.

¿What is the inverse calculation between 1 foot per minute and 661 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 foot per minute is 1.4939077e-05 times 661 knots.

Which is the same to say that 661 knots is 66938.539 feet per minute.

Six hundred sixty-one knots equals to sixty-six thousand nine hundred thirty-eight feet per minute. *Approximation

A foot per minute is one times six hundred sixty-one knots. *Approximation