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 381 knots into feet per second we have to multiply 381 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

381 kt → V_(ft/s)

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

V_(ft/s) = 381 kt × 1.6878098570997 ft/s

V_(ft/s) = 643.055555555 ft/s

The final result is:

381 kt → 643.055555555 ft/s

We conclude that 381 knots is equivalent to 643.055555555 feet per second:

381 knots = 643.055555555 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 0.0015550755939538 × 381 knots.

Another way is saying that 381 knots is equal to 1 ÷ 0.0015550755939538 feet per second.

Approximate result

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

381 kt ≅ 643.056 ft/s

An alternative is also that one foot per second is approximately zero point zero zero two times three hundred eighty-one 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