## 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 81 feet per second into knots we have to multiply 81 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

81 ft/s → V(kt)

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

V(kt) = 81 ft/s × 0.59248380129641 kt

V(kt) = 47.991187905009 kt

The final result is:

81 ft/s → 47.991187905009 kt

We conclude that 81 feet per second is equivalent to 47.991187905009 knots:

81 feet per second = 47.991187905009 knots

## Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 knot is equal to 0.020837158729626 × 81 feet per second.

Another way is saying that 81 feet per second is equal to 1 ÷ 0.020837158729626 knots.

## Approximate result

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

81 ft/s ≅ 47.991 kt

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

feet per second (ft/s) knots (kt)
82 feet per second 48.584 knots
83 feet per second 49.176 knots
84 feet per second 49.769 knots
85 feet per second 50.361 knots
86 feet per second 50.954 knots
87 feet per second 51.546 knots
88 feet per second 52.139 knots
89 feet per second 52.731 knots
90 feet per second 53.324 knots
91 feet per second 53.916 knots