DPI Calculator
Print DPI & quality.
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Tech
PPI Calculator
Enter resolution and screen size to get pixels per inch.
Pixel density
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PPI.
| Total pixels | — |
|---|---|
| Megapixels | — |
| Dot pitch | — |
| Diagonal | — |
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Enter your figures above to see the step-by-step working.
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How the PPI Calculator Works
Pixels per inch (PPI) measures how densely packed a screen’s pixels are. Take the resolution’s diagonal in pixels — the square root of width squared plus height squared — and divide by the screen’s diagonal in inches. A 1920×1080 laptop at 15.6 inches works out to about 141 PPI.
Higher PPI means sharper text and images. Phones now exceed 400 PPI; a “Retina” display is roughly the density at which a typical eye can no longer pick out individual pixels at normal viewing distance.
PPI = √(width² + height²) ÷ diagonal (inches)
Frequently Asked Questions
What is PPI?
Pixels per inch — how many pixels fit in one inch of screen. Higher PPI looks sharper.
How do you calculate PPI?
Find the diagonal resolution in pixels (√(w²+h²)) and divide by the screen’s diagonal in inches.
What is a good PPI?
Around 300+ for phones held close, and 100–160 is typical for laptops and monitors viewed further away.
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