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 4.5 miles per hour into knots we have to multiply 4.5 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

4.5 mph → V_(kt)

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

V_(kt) = 4.5 mph × 0.8689762419014 kt

V_(kt) = 3.9103930885563 kt

The final result is:

4.5 mph → 3.9103930885563 kt

We conclude that 4.5 miles per hour is equivalent to 3.9103930885563 knots:

4.5 miles per hour = 3.9103930885563 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.25572876622723 × 4.5 miles per hour.

Another way is saying that 4.5 miles per hour is equal to 1 ÷ 0.25572876622723 knots.

Approximate result

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

4.5 mph ≅ 3.91 kt

An alternative is also that one knot is approximately zero point two five six times four point five 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