821 kilometers per hour in feet per second
Conversion
821 kilometers per hour is equivalent to 748.213764946048 feet per second.[1]
Conversion in the opposite direction
The inverse of the conversion factor is that 1 foot per second is equal to 0.00133651644336175 times 821 kilometers per hour.
It can also be expressed as: 821 kilometers per hour is equal to feet per second.
Approximation
An approximate numerical result would be: eight hundred and twenty-one kilometers per hour is about seven hundred and forty-eight point two one feet per second, or alternatively, a foot per second is about zero times eight hundred and twenty-one kilometers per hour.
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.