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 138.4 feet per second into knots we have to multiply 138.4 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

138.4 ft/s → V_(kt)

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

V_(kt) = 138.4 ft/s × 0.59248380129641 kt

V_(kt) = 81.999758099423 kt

The final result is:

138.4 ft/s → 81.999758099423 kt

We conclude that 138.4 feet per second is equivalent to 81.999758099423 knots:

138.4 feet per second = 81.999758099423 knots

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.012195157927021 × 138.4 feet per second.

Another way is saying that 138.4 feet per second is equal to 1 ÷ 0.012195157927021 knots.

Approximate result

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

138.4 ft/s ≅ 82 kt

An alternative is also that one knot is approximately zero point zero one two times one hundred thirty-eight point 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