With this information, you can calculate the quantity of knots 644 feet per minute is equal to.

¿What is the inverse calculation between 1 knot and 644 feet per minute?

Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 0.15724937 times 644 feet per minute.

Which is the same to say that 644 feet per minute is 6.3593261 knots.

Six hundred forty-four feet per minute equals to six knots. *Approximation

A knot is zero times six hundred forty-four feet per minute. *Approximation