How to use this tool
- 1Enter the screen width and height in pixels (the resolution).
- 2Enter the diagonal screen size in inches.
- 3The result shows the PPI and the matching Android density class.
About this test
PPI (pixels per inch) measures screen sharpness: the higher, the crisper. It is computed from resolution and physical size using the Pythagorean theorem on the pixel diagonal.
Android groups screens into density buckets (mdpi, hdpi, xhdpi, xxhdpi, xxxhdpi) to scale icons and layouts. Knowing the density helps developers export correct assets and helps users compare screens.
Privacy: this tool runs entirely in your browser. No image, audio or device data is recorded or sent to any server.
Frequently asked questions
Where do I find my screen's resolution and size?
On the phone's spec sheet (manufacturer site or stores). Resolution is width × height in pixels; size is the diagonal in inches.
Is higher PPI always better?
Above ~300 PPI the human eye can no longer distinguish individual pixels, so gains beyond that look minor while costing battery and performance.