PPI Calculator - Calculate Screen Pixel Density
Calculate screen PPI from resolution width, resolution height and diagonal display size.
Quick answer
A PPI calculator estimates display pixel density from resolution and diagonal size, helping compare monitor, laptop, phone and TV sharpness.
Method: ScreenTestKit generates the test surface in your browser. Results depend on visual inspection; the site does not read or diagnose physical panel hardware.
How to use this test
- Enter the horizontal and vertical resolution in pixels.
- Enter the advertised diagonal screen size in inches.
- Calculate PPI and pixel pitch.
- Compare the result with viewing distance and screen size.
What to watch for
- Higher resolution on the same size increases PPI.
- Large monitors can have lower PPI even at high resolutions.
- Phones usually have high PPI because they are viewed close up.
- Scaling and subpixel layout can change perceived sharpness.
How to interpret results
High PPI
Text and fine detail can look sharper, especially at closer viewing distances.
Low PPI
Pixels may be easier to see on a desk monitor, depending on distance and scaling.
Compare with distance
Use the viewing distance calculator before deciding whether a PPI value is enough.
Frequently asked questions
Is PPI the same as resolution?
No. Resolution is pixel count; PPI also depends on physical screen size.
Is higher PPI always better?
Not always. Viewing distance, brightness, panel quality and scaling also matter.