PPI
Pixels Per Inch Calculator
A screen's pixel density from its resolution and diagonal size, with the dot pitch.
Result…
How it's calculated
PPI = √(width² + height²) ÷ diagonal Dot pitch (mm) = 25.4 ÷ PPI
Pixel density is how many pixels fit in an inch along the screen. Phones are usually 400 PPI or more, laptops 120 to 250 and desktop monitors 90 to 160; the closer you sit, the more you need. Dot pitch is the distance between neighbouring pixels.
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