Resolution Calculator
Calculate screen pixel count, simplified aspect ratio, megapixels and pixels per inch (PPI) for monitors and laptops.
FREE ONLINE TOOL
Resolution Calculator
How to calculate display PPI
Enter the screen width and height in pixels, plus the physical diagonal size in inches. The calculator estimates pixels per inch using the diagonal pixel count divided by diagonal inches.
What to know
PPI measures pixel density, not perceived image quality. Two monitors with the same resolution can have different PPI if their sizes differ.