Convert Kilometer to Millimeter
Unit definitions
Kilometer
A kilometer is $1\,000$ meters in length.
Millimeter
$\frac{1}{10^{3}}$ of a meter is a millimeter.
How to convert Kilometer to Millimeter
$$\text{Length}_{\text{mm}} = \text{Length}_{\text{km}} \cdot {10}^{6}$$
Examples
Example 1
Convert $50.0\ \text{km}$ to $\text{mm}$.
$$\text{Length}_{\text{mm}} = 50.0 \cdot {10}^{6}$$
$$\text{Length}_{\text{mm}} = 50000000$$
$$\therefore \ 50.0\ \text{km} = 50000000 \ \text{mm}$$
Example 2
Convert $70.0\ \text{km}$ to $\text{mm}$.
$$\text{Length}_{\text{mm}} = 70.0 \cdot {10}^{6}$$
$$\text{Length}_{\text{mm}} = 70000000$$
$$\therefore \ 70.0\ \text{km} = 70000000 \ \text{mm}$$
Example 3
Convert $105.0\ \text{km}$ to $\text{mm}$.
$$\text{Length}_{\text{mm}} = 105.0 \cdot {10}^{6}$$
$$\text{Length}_{\text{mm}} = 105000000$$
$$\therefore \ 105.0\ \text{km} = 105000000 \ \text{mm}$$
Example 4
Convert $150.0\ \text{km}$ to $\text{mm}$.
$$\text{Length}_{\text{mm}} = 150.0 \cdot {10}^{6}$$
$$\text{Length}_{\text{mm}} = 150000000$$
$$\therefore \ 150.0\ \text{km} = 150000000 \ \text{mm}$$
Example 5
Convert $185.0\ \text{km}$ to $\text{mm}$.
$$\text{Length}_{\text{mm}} = 185.0 \cdot {10}^{6}$$
$$\text{Length}_{\text{mm}} = 185000000$$
$$\therefore \ 185.0\ \text{km} = 185000000 \ \text{mm}$$