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 840 miles per hour into knots we have to multiply 840 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

840 mph → V_(kt)

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

V_(kt) = 840 mph × 0.8689762419014 kt

V_(kt) = 729.94004319717 kt

The final result is:

840 mph → 729.94004319717 kt

We conclude that 840 miles per hour is equivalent to 729.94004319717 knots:

840 miles per hour = 729.94004319717 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.0013699755333602 × 840 miles per hour.

Another way is saying that 840 miles per hour is equal to 1 ÷ 0.0013699755333602 knots.

Approximate result

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

840 mph ≅ 729.94 kt

An alternative is also that one knot is approximately zero point zero zero one times eight hundred forty 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