With this information, you can calculate the quantity of knots 668 miles per hour is equal to.

¿What is the inverse calculation between 1 knot and 668 miles per hour?

Performing the inverse calculation of the relationship between units, we obtain that 1 knot is 0.0017227237 times 668 miles per hour.

Which is the same to say that 668 miles per hour is 580.47613 knots.

Six hundred sixty-eight miles per hour equals to five hundred eighty knots. *Approximation

A knot is zero times six hundred sixty-eight miles per hour. *Approximation