Conversion formula

The conversion factor from feet per second to knots is 0.59248380129641, which means that 1 foot per second is equal to 0.59248380129641 knots:

1 ft/s = 0.59248380129641 kt

To convert 646.5 feet per second into knots we have to multiply 646.5 by the conversion factor in order to get the velocity amount from feet per second to knots. We can also form a simple proportion to calculate the result:

1 ft/s → 0.59248380129641 kt

646.5 ft/s → V_(kt)

Solve the above proportion to obtain the velocity V in knots:

V_(kt) = 646.5 ft/s × 0.59248380129641 kt

V_(kt) = 383.04077753813 kt

The final result is:

646.5 ft/s → 383.04077753813 kt

We conclude that 646.5 feet per second is equivalent to 383.04077753813 knots:

646.5 feet per second = 383.04077753813 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.0026106881006956 × 646.5 feet per second.

Another way is saying that 646.5 feet per second is equal to 1 ÷ 0.0026106881006956 knots.

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 five feet per second is approximately three hundred eighty-three point zero four one knots:

646.5 ft/s ≅ 383.041 kt

An alternative is also that one knot is approximately zero point zero zero three times six hundred forty-six point five feet per second.

Conversion table

feet per second to knots chart

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