## 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 686 feet per second into knots we have to multiply 686 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

686 ft/s → V(kt)

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

V(kt) = 686 ft/s × 0.59248380129641 kt

V(kt) = 406.44388768934 kt

The final result is:

686 ft/s → 406.44388768934 kt

We conclude that 686 feet per second is equivalent to 406.44388768934 knots:

686 feet per second = 406.44388768934 knots

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.0024603642231775 × 686 feet per second.

Another way is saying that 686 feet per second is equal to 1 ÷ 0.0024603642231775 knots.

## Approximate result

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

686 ft/s ≅ 406.444 kt

An alternative is also that one knot is approximately zero point zero zero two times six hundred eighty-six 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

feet per second (ft/s) knots (kt)
687 feet per second 407.036 knots
688 feet per second 407.629 knots
689 feet per second 408.221 knots
690 feet per second 408.814 knots
691 feet per second 409.406 knots
692 feet per second 409.999 knots
693 feet per second 410.591 knots
694 feet per second 411.184 knots
695 feet per second 411.776 knots
696 feet per second 412.369 knots