With this information, you can calculate the quantity of miles per hour 309 knots is equal to.

¿What is the inverse calculation between 1 mile per hour and 309 knots?

Performing the inverse calculation of the relationship between units, we obtain that 1 mile per hour is 0.0028122208 times 309 knots.

Which is the same to say that 309 knots is 355.59085 miles per hour.

Three hundred nine knots equals to three hundred fifty-five miles per hour. *Approximation

A mile per hour is zero times three hundred nine knots. *Approximation