With this information, you can calculate the quantity of knots 91 miles per hour is equal to.
¿What is the inverse calculation between 1 knot and 91 miles per hour?
Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 0.012645928 times 91 miles per hour.
Which is the same to say that 91 miles per hour is 79.076838 knots.
Ninety-one miles per hour equals to seventy-nine knots. *Approximation
A knot is zero times ninety-one miles per hour. *Approximation