Convert Em to Pixel
Unit definitions
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.
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).
How to convert Em to Pixel
$$\text{Length}_{\text{px}} = \text{Length}_{\text{em}} \cdot 16$$
Examples
Example 1
Convert $40.0\ \text{em}$ to $\text{px}$.
$$\text{Length}_{\text{px}} = 40.0 \cdot 16$$
$$\text{Length}_{\text{px}} = 640$$
$$\therefore \ 40.0\ \text{em} = 640 \ \text{px}$$
Example 2
Convert $90.0\ \text{em}$ to $\text{px}$.
$$\text{Length}_{\text{px}} = 90.0 \cdot 16$$
$$\text{Length}_{\text{px}} = 1440$$
$$\therefore \ 90.0\ \text{em} = 1440 \ \text{px}$$
Example 3
Convert $110.0\ \text{em}$ to $\text{px}$.
$$\text{Length}_{\text{px}} = 110.0 \cdot 16$$
$$\text{Length}_{\text{px}} = 1760$$
$$\therefore \ 110.0\ \text{em} = 1760 \ \text{px}$$
Example 4
Convert $130.0\ \text{em}$ to $\text{px}$.
$$\text{Length}_{\text{px}} = 130.0 \cdot 16$$
$$\text{Length}_{\text{px}} = 2080$$
$$\therefore \ 130.0\ \text{em} = 2080 \ \text{px}$$
Example 5
Convert $175.0\ \text{em}$ to $\text{px}$.
$$\text{Length}_{\text{px}} = 175.0 \cdot 16$$
$$\text{Length}_{\text{px}} = 2800$$
$$\therefore \ 175.0\ \text{em} = 2800 \ \text{px}$$