216 millimeters in kilometers

Conversion formula
How to convert 216 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: 216 ⁢ mm = 0.000216 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 4629.62962962963 times 216 millimeters.

It can also be expressed as: 216 millimeters is equal to $\frac{1}{\mathrm{4629.62962962963}}$ kilometers.

Approximation

An approximate numerical result would be: two hundred and sixteen millimeters is about zero kilometers, or alternatively, a kilometer is about four thousand, six hundred and twenty-nine point six three times two hundred and sixteen millimeters.