821 feet in kilometers
Result
The conversion result is: 821 feet is equivalent to 0.2502408 kilometers.[1]
Conversion formula
How to convert 821 feet to kilometers?
We know (by definition) that: 1 ft = 0.0003048 km.
We can set up a proportion to solve for the number of kilometers.
1 ft / 821 ft = 0.0003048 km / x km
Now, we cross multiply to solve for our unknown x:
x km = (821 ft / 1 ft) * 0.0003048 km → x km = 0.2502408 km
Conclusion:
821 ft = 0.2502408 km
Conversion in the opposite direction
The inverse of the conversion factor is that 1 kilometer is equal to 3.99615090744595 times 821 feet.
It can also be expressed as: 821 feet is equal to 1 / 3.99615090744595 kilometers.
Approximation
An approximate numerical result would be: eight hundred and twenty-one feet is about zero point two five kilometers, or alternatively, a kilometer is about four times eight hundred and twenty-one feet.
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.