Conversion formula

The conversion factor from knots to miles per hour is 1.1507794480225, which means that 1 knot is equal to 1.1507794480225 miles per hour:

1 kt = 1.1507794480225 mph

To convert 638 knots into miles per hour we have to multiply 638 by the conversion factor in order to get the velocity amount from knots to miles per hour. We can also form a simple proportion to calculate the result:

1 kt → 1.1507794480225 mph

638 kt → V_(mph)

Solve the above proportion to obtain the velocity V in miles per hour:

V_(mph) = 638 kt × 1.1507794480225 mph

V_(mph) = 734.19728783839 mph

The final result is:

638 kt → 734.19728783839 mph

We conclude that 638 knots is equivalent to 734.19728783839 miles per hour:

638 knots = 734.19728783839 miles per hour

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 mile per hour is equal to 0.0013620317271182 × 638 knots.

Another way is saying that 638 knots is equal to 1 ÷ 0.0013620317271182 miles per hour.

Approximate result

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

638 kt ≅ 734.197 mph

An alternative is also that one mile per hour is approximately zero point zero zero one times six hundred thirty-eight knots.

Conversion table

knots to miles per hour chart

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