With this information, you can calculate the quantity of miles per hour 18 knots is equal to.

¿What is the inverse calculation between 1 mile per hour and 18 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 mile per hour is 0.048276458 times 18 knots.

Which is the same to say that 18 knots is 20.71403 miles per hour.

Eighteen knots equals to twenty miles per hour. *Approximation

A mile per hour is zero times eighteen knots. *Approximation