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PPI Calculator — Pixels Per Inch
Enter your screen’s resolution and diagonal size to calculate its pixel density in pixels per inch (PPI).
Common Screen PPI Reference
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Frequently Asked Questions
What PPI is considered ‘Retina’ quality?
Apple defines Retina as pixel density high enough that individual pixels are indistinguishable at typical viewing distance. For phones held ~10 inches away: ~300 PPI. For laptop screens at ~18 inches: ~200 PPI. For desktop monitors at ~24 inches: ~110-140 PPI.
Does higher PPI always look better?
Beyond a threshold (Retina), the human eye can’t distinguish individual pixels, so additional PPI has diminishing visual benefit. However, higher PPI does help with text rendering and fine graphics even above the threshold.