With this information, you can calculate the quantity of knots 40 miles per hour is equal to.

¿What is the inverse calculation between 1 knot and 40 miles per hour?

Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 0.028769486 times 40 miles per hour.

Which is the same to say that 40 miles per hour is 34.75905 knots.

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

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