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Calculators / Technology / Screen pixel density
Screen pixel density calculator
Calculate display pixel density and aspect ratio from resolution and diagonal size.
On this page
Pixel density91.79PPI
Aspect ratio value1.78: 1
Total megapixels2.07MP
Calculator controls
How to calculate
Calculate display pixel density and aspect ratio from resolution and diagonal size.
PPI = √(horizontal pixels² + vertical pixels²) ÷ diagonal inches
Worked example
Horizontal pixels: 1920; Vertical pixels: 1080; Diagonal size (in): 24.
Pixel density: 91.79 PPI; Aspect ratio value: 1.78 : 1; Total megapixels: 2.07 MP.
Assumptions and limits
PPI describes pixel density, not viewing-distance sharpness, panel quality, scaling, or physical screen width.
Results are rounded for display; calculations use unrounded values. Read our calculation methodology.
Understanding the result
Calculate display pixel density and aspect ratio from resolution and diagonal size. The result follows the displayed formula and keeps every adjustable assumption visible.
When this tool is useful
Use this tool to plan quantities or compare scenarios before making a purchase or technical decision.
Understanding your inputs
| Input | What to enter |
|---|---|
| Horizontal pixels | Enter a number of at least 1 and no more than 100000. |
| Vertical pixels | Enter a number of at least 1 and no more than 100000. |
| Diagonal size (in) | Enter a number of at least 0.000001 and no more than 1000. |
Frequently asked questions
What can change the screen pixel density result?
PPI describes pixel density, not viewing-distance sharpness, panel quality, scaling, or physical screen width.
Should I round the inputs first?
No. Enter the best measurements available and round only the practical final quantity, such as full packs, boards, sheets, or components.