How do you calculate pixels of mobile device screen?

To calculate the total number of pixels on a mobile device screen, you multiply the screen's width in pixels by its height in pixels. For example, if a screen has a resolution of 1080 pixels in width and 1920 pixels in height, the total pixel count would be 1080 x 1920 = 2,073,600 pixels. This total represents the number of individual points of color that make up the display. Additionally, pixel density, measured in pixels per inch (PPI), can be calculated using the diagonal resolution and screen size.