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 643 knots into feet per second we have to multiply 643 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

643 kt → V_(ft/s)

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

V_(ft/s) = 643 kt × 1.6878098570997 ft/s

V_(ft/s) = 1085.2617381151 ft/s

The final result is:

643 kt → 1085.2617381151 ft/s

We conclude that 643 knots is equivalent to 1085.2617381151 feet per second:

643 knots = 1085.2617381151 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 0.00092143670497109 × 643 knots.

Another way is saying that 643 knots is equal to 1 ÷ 0.00092143670497109 feet per second.

Approximate result

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

643 kt ≅ 1085.262 ft/s

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