Pixel Density (PPI) Calculator
Enter screen resolution and diagonal size to calculate pixels per inch and total pixel count.
PPI Calculator
Enter resolution and screen size.
Resolution Presets
Screen Details
Results
Pixels Per Inch
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Total Pixels
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Megapixels
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Pixel Size
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PPI Reference by Device Type
| Device | Typical PPI | Retina Threshold | Viewing Distance |
|---|---|---|---|
| Phone | 400–500+ | 300+ PPI | 10–14" |
| Tablet | 250–330 | 260+ PPI | 14–18" |
| Laptop | 130–260 | 200+ PPI | 16–22" |
| Monitor | 90–220 | 140+ PPI | 20–30" |
| TV | 40–100 | N/A | 5–15 ft |
The Formula
PPI = √(W² + H²) ÷ diagonal
where W = horizontal pixels, H = vertical pixels