664 knots in feet per second
Conversion
664 knots is equivalent to 1120.70574511519 feet per second.[1]
Conversion in the opposite direction
The inverse of the conversion factor is that 1 foot per second is equal to 0.000892294881469723 times 664 knots.
It can also be expressed as: 664 knots is equal to feet per second.
Approximation
An approximate numerical result would be: six hundred and sixty-four knots is about one thousand, one hundred and twenty point seven one feet per second, or alternatively, a foot per second is about zero times six hundred and sixty-four knots.
Footnotes
[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).
Results may contain small errors due to the use of floating point arithmetic.