Conversion formula

The conversion factor from knots to feet per second is 1.6878098570997, which means that 1 knot is equal to 1.6878098570997 feet per second:

1 kt = 1.6878098570997 ft/s

To convert 646.4 knots into feet per second we have to multiply 646.4 by the conversion factor in order to get the velocity amount from knots to feet per second. We can also form a simple proportion to calculate the result:

1 kt → 1.6878098570997 ft/s

646.4 kt → V_(ft/s)

Solve the above proportion to obtain the velocity V in feet per second:

V_(ft/s) = 646.4 kt × 1.6878098570997 ft/s

V_(ft/s) = 1091.0002916293 ft/s

The final result is:

646.4 kt → 1091.0002916293 ft/s

We conclude that 646.4 knots is equivalent to 1091.0002916293 feet per second:

646.4 knots = 1091.0002916293 feet per second

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 foot per second is equal to 0.0009165900391343 × 646.4 knots.

Another way is saying that 646.4 knots is equal to 1 ÷ 0.0009165900391343 feet per second.

Approximate result

For practical purposes we can round our final result to an approximate numerical value. We can say that six hundred forty-six point four knots is approximately one thousand ninety-one feet per second:

646.4 kt ≅ 1091 ft/s

An alternative is also that one foot per second is approximately zero point zero zero one times six hundred forty-six point four knots.

Conversion table

knots to feet per second chart

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