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Screen Size & PPI Calculator
Calculate screen dimensions, PPI (pixels per inch), and total pixels from diagonal size and resolution.

Screen Size & PPI Calculator

Compare monitor sharpness and size with this PPI calculator. Enter your screen diagonal and resolution to calculate pixels per inch, physical screen dimensions, total pixel count, and aspect ratio. Higher PPI means sharper text and images.

PPI (pixels per inch) determines how sharp a display looks:

  • Below 100 PPI: Individual pixels visible at normal viewing distance
  • 100-150 PPI: Standard desktop monitors
  • 150-250 PPI: High-DPI / Retina-class displays
  • 250-400 PPI: Smartphone displays
  • 400+ PPI: Beyond human perception at normal distance

Common resolutions: 1920x1080 (Full HD), 2560x1440 (QHD), 3840x2160 (4K UHD), 5120x2880 (5K).

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