# PPI
> PPI means pixels per inch, a rough measure of how sharp a screen looks up close.
Topics: Smartphones, Computing
Difficulty: Everyday
Aliases: pixels per inch, pixel density
Updated: 2026-06-26T08:00:00.000Z
## Go deeper
PPI means pixels per inch, a rough measure of how sharp a screen looks up close. In everyday buying decisions, the useful question is not just what the spec says, but what it changes for comfort, cost, speed, safety, or battery life.