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 381.5 knots into feet per second we have to multiply 381.5 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

381.5 kt → V_(ft/s)

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

V_(ft/s) = 381.5 kt × 1.6878098570997 ft/s

V_(ft/s) = 643.89946048355 ft/s

The final result is:

381.5 kt → 643.89946048355 ft/s

We conclude that 381.5 knots is equivalent to 643.89946048355 feet per second:

381.5 knots = 643.89946048355 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 0.0015530374870155 × 381.5 knots.

Another way is saying that 381.5 knots is equal to 1 ÷ 0.0015530374870155 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 point five knots is approximately six hundred forty-three point eight nine nine feet per second:

381.5 kt ≅ 643.899 ft/s

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