Conversion formula

The conversion factor from knots to feet per second is 1.6878098570997, which means that 1 knot is equal to 1.6878098570997 feet per second:

1 kt = 1.6878098570997 ft/s

To convert 81.5 knots into feet per second we have to multiply 81.5 by the conversion factor in order to get the velocity amount from knots to feet per second. We can also form a simple proportion to calculate the result:

1 kt → 1.6878098570997 ft/s

81.5 kt → V_(ft/s)

Solve the above proportion to obtain the velocity V in feet per second:

V_(ft/s) = 81.5 kt × 1.6878098570997 ft/s

V_(ft/s) = 137.55650335363 ft/s

The final result is:

81.5 kt → 137.55650335363 ft/s

We conclude that 81.5 knots is equivalent to 137.55650335363 feet per second:

81.5 knots = 137.55650335363 feet per second

Alternative conversion

We can also convert by utilizing the inverse value of the conversion factor. In this case 1 foot per second is equal to 0.0072697398932075 × 81.5 knots.

Another way is saying that 81.5 knots is equal to 1 ÷ 0.0072697398932075 feet per second.

Approximate result

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

81.5 kt ≅ 137.557 ft/s

An alternative is also that one foot per second is approximately zero point zero zero seven times eighty-one point five knots.

Conversion table

knots to feet per second chart

For quick reference purposes, below is the conversion table you can use to convert from knots to feet per second