Display pixel density
Find pixels per inch and physical pixel pitch.
How this works
PPI = √(horizontal pixels² + vertical pixels²)/diagonal inches.
Example
Using the example inputs, pixel density is 163.178309 ppi.
- Horizontal resolution
- 3840 px
- Vertical resolution
- 2160 px
- Screen diagonal
- 27 in
- Pixel density
- 163.178309 ppi
Scope and assumptions
Assumes square pixels and an active diagonal measurement.
OpenStax mathematics reference