72 millimeters in kilometers

Conversion formula
How to convert 72 millimeters to kilometers?

We know (by definition) that: $1\mathrm{mm}=1e-06\mathrm{km}$

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

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

Conclusion: 72 ⁢ mm = 7.2e-05 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 13888.8888888889 times 72 millimeters.

It can also be expressed as: 72 millimeters is equal to $\frac{1}{\mathrm{13888.8888888889}}$ kilometers.

Approximation

An approximate numerical result would be: seventy-two millimeters is about zero kilometers, or alternatively, a kilometer is about thirteen thousand, eight hundred and eighty-eight point eight eight times seventy-two millimeters.