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 642 knots into miles per hour we have to multiply 642 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

642 kt → V_(mph)

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

V_(mph) = 642 kt × 1.1507794480225 mph

V_(mph) = 738.80040563048 mph

The final result is:

642 kt → 738.80040563048 mph

We conclude that 642 knots is equivalent to 738.80040563048 miles per hour:

642 knots = 738.80040563048 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 0.001353545548133 × 642 knots.

Another way is saying that 642 knots is equal to 1 ÷ 0.001353545548133 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 forty-two knots is approximately seven hundred thirty-eight point eight miles per hour:

642 kt ≅ 738.8 mph

An alternative is also that one mile per hour is approximately zero point zero zero one times six hundred forty-two 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