15 millimeters in kilometers

Conversion formula
How to convert 15 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: 15 ⁢ mm = 1.4999999999999999e-05 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 66666.6666666667 times 15 millimeters.

It can also be expressed as: 15 millimeters is equal to $\frac{1}{\mathrm{66666.6666666667}}$ kilometers.

Approximation

An approximate numerical result would be: fifteen millimeters is about zero kilometers, or alternatively, a kilometer is about sixty-six thousand, six hundred and sixty-six point six six times fifteen millimeters.