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 691 feet per second into knots we have to multiply 691 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

691 ft/s → V_(kt)

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

V_(kt) = 691 ft/s × 0.59248380129641 kt

V_(kt) = 409.40630669582 kt

The final result is:

691 ft/s → 409.40630669582 kt

We conclude that 691 feet per second is equivalent to 409.40630669582 knots:

691 feet per second = 409.40630669582 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.002442561298263 × 691 feet per second.

Another way is saying that 691 feet per second is equal to 1 ÷ 0.002442561298263 knots.

Approximate result

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

691 ft/s ≅ 409.406 kt

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