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 553 knots into miles per hour we have to multiply 553 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

553 kt → V_(mph)

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

V_(mph) = 553 kt × 1.1507794480225 mph

V_(mph) = 636.38103475647 mph

The final result is:

553 kt → 636.38103475647 mph

We conclude that 553 knots is equivalent to 636.38103475647 miles per hour:

553 knots = 636.38103475647 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 0.001571385609225 × 553 knots.

Another way is saying that 553 knots is equal to 1 ÷ 0.001571385609225 miles per hour.

Approximate result

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

553 kt ≅ 636.381 mph

An alternative is also that one mile per hour is approximately zero point zero zero two times five hundred fifty-three 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