821 knots in feet per second
Result
The conversion result is: 821 knots is equivalent to 1385.69189268008 feet per second.[1]
Conversion in the opposite direction
The inverse of the conversion factor is that 1 foot per second is equal to 0.000721661146523625 times 821 knots.
It can also be expressed as: 821 knots is equal to 1 / 0.000721661146523625 feet per second.
Approximation
An approximate numerical result would be: eight hundred and twenty-one knots is about one thousand, three hundred and eighty-five point six nine feet per second, or alternatively, a foot per second is about zero times eight hundred and twenty-one 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.