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 428 miles per hour into knots we have to multiply 428 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

428 mph → V_(kt)

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

V_(kt) = 428 mph × 0.8689762419014 kt

V_(kt) = 371.9218315338 kt

The final result is:

428 mph → 371.9218315338 kt

We conclude that 428 miles per hour is equivalent to 371.9218315338 knots:

428 miles per hour = 371.9218315338 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.0026887370280901 × 428 miles per hour.

Another way is saying that 428 miles per hour is equal to 1 ÷ 0.0026887370280901 knots.

Approximate result

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

428 mph ≅ 371.922 kt

An alternative is also that one knot is approximately zero point zero zero three times four hundred twenty-eight 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