821 meters in kilometers

Conversion formula
How to convert 821 meters to kilometers?

We know (by definition) that: $1\mathrm{m}=0.001\mathrm{km}$

We can set up a proportion to solve for the number of kilometers.

Now, we cross multiply to solve for our unknown $x$:

Conclusion: 821 ⁢ m = 0.8210000000000001 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 1.21802679658953 times 821 meters.

It can also be expressed as: 821 meters is equal to $\frac{1}{\mathrm{1.21802679658953}}$ kilometers.

Approximation

An approximate numerical result would be: eight hundred and twenty-one meters is about zero point eight two kilometers, or alternatively, a kilometer is about one point two one times eight hundred and twenty-one meters.