With this information, you can calculate the quantity of knots 491 feet per minute is equal to.
¿What is the inverse calculation between 1 knot and 491 feet per minute?
Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 0.20624968 times 491 feet per minute.
Which is the same to say that 491 feet per minute is 4.8484924 knots.
Four hundred ninety-one feet per minute equals to four knots. *Approximation
A knot is zero times four hundred ninety-one feet per minute. *Approximation