Pixels Per Inch Calculator: PPI Formula and Tables

Pixels Per Inch Calculator: PPI Formula and Tables Pixels per inch (PPI) tells you how tightly pixels are packed into a display or a printed image. A higher PPI means finer detail, sharper text, and smoother curves. A lower PPI means individual pixels become visible — the image looks soft or blocky. Knowing the PPI of a screen helps you decide if a monitor is worth buying. Knowing the PPI of a print tells you whether the output will look sharp or pixelated at viewing distance. The math is straig