18 centimeters in kilometers

Conversion formula
How to convert 18 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: 18 ⁢ cm = 0.00018 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 5555.55555555556 times 18 centimeters.

It can also be expressed as: 18 centimeters is equal to $\frac{1}{\mathrm{5555.55555555556}}$ kilometers.

Approximation

An approximate numerical result would be: eighteen centimeters is about zero kilometers, or alternatively, a kilometer is about five thousand, five hundred and fifty-five point five six times eighteen centimeters.