Quick guide
Try an example
You enter
- Width (px)
800
- Height (px)
600
- Screen diagonal (in)
10
You get
- Pixels per inch (PPI)
100
- Physical width (in)
8
- Physical height (in)
6
How it works & limits
Enter width and height in pixels and the physical diagonal in inches. The calculation assumes square pixels and gives physical dimensions in inches.