How to convert 823 feet to kilometers?
We know (by definition) that:
We can set up a proportion to solve for the number of kilometers.
Now, we cross multiply to solve for our unknown :
Conversion in the opposite direction
The inverse of the conversion factor is that 1 kilometer is equal to 3.98643972662591 times 823 feet.
It can also be expressed as: 823 feet is equal to kilometers.
An approximate numerical result would be: eight hundred and twenty-three feet is about zero point two five kilometers, or alternatively, a kilometer is about three point nine nine times eight hundred and twenty-three feet.
 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.