With this information, you can calculate the quantity of miles per hour 397 knots is equal to.
¿What is the inverse calculation between 1 mile per hour and 397 knots?
Performing the inverse calculation of the relationship between units, we obtain that 1 mile per hour is 0.002188857 times 397 knots.
Which is the same to say that 397 knots is 456.85944 miles per hour.
Three hundred ninety-seven knots equals to four hundred fifty-six miles per hour. *Approximation
A mile per hour is zero times three hundred ninety-seven knots. *Approximation
