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Screen Pixel Density Calculator
Estimate physical pixel density from active-screen resolution and diagonal size.
Your result
EVERYDAYEnter your values and select calculate.
On this page How it works & practical examples
How to use the Screen Pixel Density Calculator
Measure the active display diagonal, excluding the bezel. The calculator uses the pixel-grid aspect ratio to infer approximate physical width and height and reports the corresponding pixel pitch.
The calculation
PPI = √(horizontal pixels² + vertical pixels²) / diagonal inches
Worked example
A 1,920 × 1,080 display with a 24-inch active diagonal has about 91.7878 pixels per inch.
Assumptions and limits
Assumes square pixels and the stated active resolution. Software scaling, virtual display dimensions and non-square-pixel formats do not change the physical-density formula.
Common questions
Does 150% interface scaling change PPI?
No. It changes interface sizing, not physical pixels per inch.
Can I use the device diagonal including the frame?
Use the active display area; including the frame would underestimate density.