Screen PPI Calculator

Calculate pixels per inch for any screen from its resolution and diagonal size

PPI = √(w² + h²) / diagonal

Pixels per inch (PPI)

91.8

Display classification

Medium density

About this calculator

Calculate the pixels per inch (PPI) of any screen from its resolution and diagonal size. Determine whether a display qualifies as Retina or HiDPI based on its pixel density.

Common examples

1920×1080 on 24" = 91.79 PPI
2560×1440 on 27" = 108.79 PPI
3840×2160 on 27" = 163.18 PPI
2532×1170 on 6.1" = 460 PPI
2560×1600 on 13.3" = 227 PPI