Screen DPI Calculator
Enter your screen diagonal and resolution to calculate pixels-per-inch (PPI/DPI) and compare to Retina, 4K, and common phone displays
Screen Specifications
Common Screens
Laptop
Desktop
Monitor
Phone
Tablet
Formula: PPI = √(W² + H²) ÷ diagonal inches
Note: DPI and PPI are often used interchangeably for screens. Physical DPI (dots per inch) relates to printing, while screen PPI measures pixel density.
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