20 centimeters in kilometers

Conversion formula
How to convert 20 centimeters to kilometers?

We know (by definition) that: $1\mathrm{cm}=1e-05\mathrm{km}$

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

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

Conclusion: 20 ⁢ cm = 0.0002 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 5000 times 20 centimeters.

It can also be expressed as: 20 centimeters is equal to $\frac{1}{\mathrm{5000}}$ kilometers.

Approximation

An approximate numerical result would be: twenty centimeters is about zero kilometers, or alternatively, a kilometer is about five thousand times twenty centimeters.