What is pixel density?
Pixel density is the amount of pixels on a particular screen, measured in pixels per inch (ppi). Pixel density is estimated by dividing the pixel resolution of a screen by its diagonal size.
What is PPI?
PPI is the acronym from Pixels Per Inch. It is a unit of measure used to quantify the number of pixels found on a square inch surface. To get a clear idea of what it means, imagine a square inch that’s divided and organized in a grid of cells. Each and every cell in that grid has a pixel inside. The number of cells inside the grid, also known as pixels, tells you the PPI.
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