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 687 feet per second into knots we have to multiply 687 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

687 ft/s → V_(kt)

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

V_(kt) = 687 ft/s × 0.59248380129641 kt

V_(kt) = 407.03637149063 kt

The final result is:

687 ft/s → 407.03637149063 kt

We conclude that 687 feet per second is equivalent to 407.03637149063 knots:

687 feet per second = 407.03637149063 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.0024567829069865 × 687 feet per second.

Another way is saying that 687 feet per second is equal to 1 ÷ 0.0024567829069865 knots.

Approximate result

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

687 ft/s ≅ 407.036 kt

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