With this information, you can calculate the quantity of knots 21 feet per minute is equal to.
¿What is the inverse calculation between 1 knot and 21 feet per minute?
Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 4.8223139 times 21 feet per minute.
Which is the same to say that 21 feet per minute is 0.20736933 knots.
Twenty-one feet per minute equals to zero knots. *Approximation
A knot is four times twenty-one feet per minute. *Approximation
