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 664 feet per second into knots we have to multiply 664 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

664 ft/s → V_(kt)

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

V_(kt) = 664 ft/s × 0.59248380129641 kt

V_(kt) = 393.40924406082 kt

The final result is:

664 ft/s → 393.40924406082 kt

We conclude that 664 feet per second is equivalent to 393.40924406082 knots:

664 feet per second = 393.40924406082 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.0025418823149092 × 664 feet per second.

Another way is saying that 664 feet per second is equal to 1 ÷ 0.0025418823149092 knots.

Approximate result

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

664 ft/s ≅ 393.409 kt

An alternative is also that one knot is approximately zero point zero zero three times six hundred sixty-four 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