When you hear ppi and dpi, if your first reaction is OMG, this article is for you. Whether you’re new to the industry or a veteran who’s just been faking it, this handy guide will help you to talk shop like a true graphics pro — no pricy Graphics for Dummies books required.

I keep hearing people use the terms “ppi” and “dpi” interchangeably. What do these mean, is there a difference between them, and should I care?
Some folks, including some computer hardware manufacturers, use ppi and dpi interchangeably. Although they are similar, there is a difference.