685 kilometers per hour in feet per second
Conversion
685 kilometers per hour is equivalent to 624.270924467775 feet per second.[1]
Conversion in the opposite direction
The inverse of the conversion factor is that 1 foot per second is equal to 0.00160186861313869 times 685 kilometers per hour.
It can also be expressed as: 685 kilometers per hour is equal to feet per second.
Approximation
An approximate numerical result would be: six hundred and eighty-five kilometers per hour is about six hundred and twenty-four point two six feet per second, or alternatively, a foot per second is about zero times six hundred and eighty-five 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.