18 kilometers in centimeters

Conversion formula
How to convert 18 kilometers to centimeters?

We know (by definition) that: $1\mathrm{km}=100000\mathrm{cm}$

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

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

Conclusion: 18 ⁢ km = 1800000 ⁢ cm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 centimeter is equal to 5.55555555555556e-07 times 18 kilometers.

It can also be expressed as: 18 kilometers is equal to $\frac{1}{\mathrm{5.55555555555556e-07}}$ centimeters.

Approximation

An approximate numerical result would be: eighteen kilometers is about one million, eight hundred thousand centimeters, or alternatively, a centimeter is about zero times eighteen kilometers.