## 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 646 knots into miles per hour we have to multiply 646 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

646 kt → V(mph)

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

V(mph) = 646 kt × 1.1507794480225 mph

V(mph) = 743.40352342257 mph

The final result is:

646 kt → 743.40352342257 mph

We conclude that 646 knots is equivalent to 743.40352342257 miles per hour:

646 knots = 743.40352342257 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 0.0013451644611477 × 646 knots.

Another way is saying that 646 knots is equal to 1 ÷ 0.0013451644611477 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-six knots is approximately seven hundred forty-three point four zero four miles per hour:

646 kt ≅ 743.404 mph

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

knots (kt) miles per hour (mph)
647 knots 744.554 miles per hour
648 knots 745.705 miles per hour
649 knots 746.856 miles per hour
650 knots 748.007 miles per hour
651 knots 749.157 miles per hour
652 knots 750.308 miles per hour
653 knots 751.459 miles per hour
654 knots 752.61 miles per hour
655 knots 753.761 miles per hour
656 knots 754.911 miles per hour