Conversion formula

The conversion factor from miles per hour to knots is 0.8689762419014, which means that 1 mile per hour is equal to 0.8689762419014 knots:

1 mph = 0.8689762419014 kt

To convert 389.9 miles per hour into knots we have to multiply 389.9 by the conversion factor in order to get the velocity amount from miles per hour to knots. We can also form a simple proportion to calculate the result:

1 mph → 0.8689762419014 kt

389.9 mph → V_(kt)

Solve the above proportion to obtain the velocity V in knots:

V_(kt) = 389.9 mph × 0.8689762419014 kt

V_(kt) = 338.81383671736 kt

The final result is:

389.9 mph → 338.81383671736 kt

We conclude that 389.9 miles per hour is equivalent to 338.81383671736 knots:

389.9 miles per hour = 338.81383671736 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.0029514733214223 × 389.9 miles per hour.

Another way is saying that 389.9 miles per hour is equal to 1 ÷ 0.0029514733214223 knots.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that three hundred eighty-nine point nine miles per hour is approximately three hundred thirty-eight point eight one four knots:

389.9 mph ≅ 338.814 kt

An alternative is also that one knot is approximately zero point zero zero three times three hundred eighty-nine point nine miles per hour.

Conversion table

miles per hour to knots chart

For quick reference purposes, below is the conversion table you can use to convert from miles per hour to knots