Display Pixel Density Calculator
Calculate physical pixels per inch and pixel pitch from a display’s resolution and diagonal, with logical UI scaling kept separate.
Use this result well
- Inputs that matter
- Horizontal pixels, Vertical pixels, Diagonal (inches)
- Output to expect
- Pixels per inch
- Check the units and required inputs before comparing results.
- Keep the assumptions with a copied result so you can reproduce the calculation later.
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Reference & details
How it works
Updated September 2026
How it works
Updated September 2026Physical display pixel density
Calculate physical PPI from whole pixel dimensions and the measured display diagonal. Logical UI scaling and viewing-distance judgments are separate. Physical geometry only. No Retina classification or automatic Android dp conversion is inferred. Operating-system scale and logical display dimensions can differ from physical pixels. The result does not judge text legibility at a particular viewing distance.
PPI = sqrt(horizontal pixels² + vertical pixels²) ÷ diagonal inchesUpdated: September 2026
Example Scenarios
An arithmetic illustration using the values shown. Replace them with measurements or assumptions for your own scope.
→ 108.7855 PPI
FAQ
About Display Pixel Density Calculator
Calculate physical PPI from whole pixel dimensions and the measured display diagonal. Logical UI scaling and viewing-distance judgments are separate.