Convert Pixel to Em
Unit definitions
Pixel
A pixel is a unit of length based on the $96$ DPI standard, equal to $\frac{1}{96}$ of an inch (approximately $0.000\,264\,583$ meters).
Em
An em is a unit of typography equal to the point size of the font, commonly $12$ points or $\frac{1}{6}$ of an inch.
How to convert Pixel to Em
$$\text{Length}_{\text{em}} = \frac{\text{Length}_{\text{px}}}{16}$$
Examples
Example 1
Convert $20.0\ \text{px}$ to $\text{em}$.
$$\text{Length}_{\text{em}} = \frac{20.0}{16}$$
$$\text{Length}_{\text{em}} = 1.25$$
$$\therefore \ 20.0\ \text{px} = 1.25 \ \text{em}$$
Example 2
Convert $70.0\ \text{px}$ to $\text{em}$.
$$\text{Length}_{\text{em}} = \frac{70.0}{16}$$
$$\text{Length}_{\text{em}} = 4.375$$
$$\therefore \ 70.0\ \text{px} = 4.375 \ \text{em}$$
Example 3
Convert $105.0\ \text{px}$ to $\text{em}$.
$$\text{Length}_{\text{em}} = \frac{105.0}{16}$$
$$\text{Length}_{\text{em}} = 6.5625$$
$$\therefore \ 105.0\ \text{px} = 6.5625 \ \text{em}$$
Example 4
Convert $150.0\ \text{px}$ to $\text{em}$.
$$\text{Length}_{\text{em}} = \frac{150.0}{16}$$
$$\text{Length}_{\text{em}} = 9.375$$
$$\therefore \ 150.0\ \text{px} = 9.375 \ \text{em}$$
Example 5
Convert $165.0\ \text{px}$ to $\text{em}$.
$$\text{Length}_{\text{em}} = \frac{165.0}{16}$$
$$\text{Length}_{\text{em}} = 10.3125$$
$$\therefore \ 165.0\ \text{px} = 10.3125 \ \text{em}$$