Convert Millimeter to Kilometer
Unit definitions
Millimeter
$\frac{1}{10^{3}}$ of a meter is a millimeter.
Kilometer
A kilometer is $1\,000$ meters in length.
How to convert Millimeter to Kilometer
$$\text{Length}_{\text{km}} = \frac{\text{Length}_{\text{mm}}}{{10}^{6}}$$
Examples
Example 1
Convert $20.0\ \text{mm}$ to $\text{km}$.
$$\text{Length}_{\text{km}} = \frac{20.0}{{10}^{6}}$$
$$\text{Length}_{\text{km}} = 0.00002$$
$$\therefore \ 20.0\ \text{mm} = 0.00002 \ \text{km}$$
Example 2
Convert $60.0\ \text{mm}$ to $\text{km}$.
$$\text{Length}_{\text{km}} = \frac{60.0}{{10}^{6}}$$
$$\text{Length}_{\text{km}} = 0.00006$$
$$\therefore \ 60.0\ \text{mm} = 0.00006 \ \text{km}$$
Example 3
Convert $100.0\ \text{mm}$ to $\text{km}$.
$$\text{Length}_{\text{km}} = \frac{100.0}{{10}^{6}}$$
$$\text{Length}_{\text{km}} = 0.0001$$
$$\therefore \ 100.0\ \text{mm} = 0.0001 \ \text{km}$$
Example 4
Convert $130.0\ \text{mm}$ to $\text{km}$.
$$\text{Length}_{\text{km}} = \frac{130.0}{{10}^{6}}$$
$$\text{Length}_{\text{km}} = 0.00013$$
$$\therefore \ 130.0\ \text{mm} = 0.00013 \ \text{km}$$
Example 5
Convert $160.0\ \text{mm}$ to $\text{km}$.
$$\text{Length}_{\text{km}} = \frac{160.0}{{10}^{6}}$$
$$\text{Length}_{\text{km}} = 0.00016$$
$$\therefore \ 160.0\ \text{mm} = 0.00016 \ \text{km}$$