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