With this information, you can calculate the quantity of knots 15 miles per hour is equal to.

¿What is the inverse calculation between 1 knot and 15 miles per hour?

Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 0.07671863 times 15 miles per hour.

Which is the same to say that 15 miles per hour is 13.034644 knots.

Fifteen miles per hour equals to thirteen knots. *Approximation

A knot is zero times fifteen miles per hour. *Approximation