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 398 knots into feet per second we have to multiply 398 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

398 kt → V_(ft/s)

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

V_(ft/s) = 398 kt × 1.6878098570997 ft/s

V_(ft/s) = 671.7483231257 ft/s

The final result is:

398 kt → 671.7483231257 ft/s

We conclude that 398 knots is equivalent to 671.7483231257 feet per second:

398 knots = 671.7483231257 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 0.0014886527670764 × 398 knots.

Another way is saying that 398 knots is equal to 1 ÷ 0.0014886527670764 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 ninety-eight knots is approximately six hundred seventy-one point seven four eight feet per second:

398 kt ≅ 671.748 ft/s

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