With this information, you can calculate the quantity of knots 45 miles per hour is equal to.

¿What is the inverse calculation between 1 knot and 45 miles per hour?

Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 0.025572877 times 45 miles per hour.

Which is the same to say that 45 miles per hour is 39.103931 knots.

Forty-five miles per hour equals to thirty-nine knots. *Approximation

A knot is zero times forty-five miles per hour. *Approximation