3 millimeters in kilometers

Conversion formula
How to convert 3 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: 3 ⁢ mm = 3e-06 ⁢ km

Conversion in the opposite direction

The inverse of the conversion factor is that 1 kilometer is equal to 333333.333333333 times 3 millimeters.

It can also be expressed as: 3 millimeters is equal to $\frac{1}{\mathrm{333333.333333333}}$ kilometers.

Approximation

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