PPI Calculator
Calculate screen pixel density from resolution and diagonal size, and get the design multiplier for retina assets. Free, no signup.
91.79 PPI
Frequently Asked Questions
- What is the difference between PPI and DPI?
- PPI (pixels per inch) describes screen pixel density, while DPI (dots per inch) describes printer output resolution. Screens are measured in PPI, though the terms are often used interchangeably.
- How is PPI calculated?
- PPI = diagonal resolution in pixels ÷ diagonal screen size in inches. The diagonal pixel count comes from the Pythagorean theorem applied to the width and height.