How to calculate screen PPI from resolution and diagonal
Use the pixel diagonal and visible physical diagonal to calculate pixels per inch without treating resolution alone as density.
Read guideScreen-density formulas
Screen density guides with explicit formulas
Three focused guides explain PPI, pixel pitch, px/cm and physical dimensions.
PPI, pixel pitch and pixels per centimeter
Convert one physical pixel-density result into px/cm and millimeter pitch with explicit unit relationships.
Read guideScreen width and height from diagonal and aspect ratio
Calculate visible screen width and height from a diagonal and width-to-height ratio, with direct formulas and common 16:9 results.
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