DPI / PPI Calculator

What is the difference between PPI and DPI?

PPI (Pixels Per Inch) refers to the pixel density of a digital display, while DPI (Dots Per Inch) traditionally refers to print resolution. For most digital screens, they are numerically equivalent, but DPI is more relevant when preparing images for print.

What PPI is considered "Retina" quality?

Apple defines Retina displays as having a pixel density high enough that individual pixels cannot be distinguished at a normal viewing distance. For phones this is around 326+ PPI, for tablets about 264+ PPI, and for laptops about 220+ PPI.

How do I find my screen's diagonal size?

The diagonal size is measured from one corner of the display to the opposite corner, measured only across the active display area (not the bezel). You can usually find this in your device specifications.

What is a good PPI for a monitor?

For desktop monitors, 90-110 PPI is standard (24" 1080p or 27" 1440p). For sharper text and images, 140-165 PPI is excellent (27" 4K). Higher PPI is better for close viewing distances like laptops and phones.

Does higher PPI always mean a better display?

Higher PPI means sharper images, but it depends on viewing distance. A phone at 400+ PPI looks great because it is held close, while a TV at 50 PPI looks fine from across the room. The "ideal" PPI depends on how close you sit to the screen.