Pixels Per Inch

What Does Pixels Per Inch Mean?

Pixels per inch (PPI) is a measurement used to define the resolution of a computer display. This metric evaluates the picture/image quality that a particular computing or output display device is able to display.


Pixels per inch is also known as pixel density.

Techopedia Explains Pixels Per Inch

PPI has various implementations in different devices. It is entirely dependent on the display resolution capability of the display adapter. In computer display devices, PPI is calculated by dividing the diagonal resolution of the display device by its diagonal size in inches. For example, a display monitor with 12-inch width and 9-inch height has a PPI of 85 in both the horizontal and vertical directions. Higher resolution will result in more PPI. Similarly, the more the PPI the better the image views will be. This is true for both for computers and printing devices.


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Margaret Rouse

Margaret Rouse is an award-winning technical writer and teacher known for her ability to explain complex technical subjects to a non-technical, business audience. Over the past twenty years her explanations have appeared on TechTarget websites and she's been cited as an authority in articles by the New York Times, Time Magazine, USA Today, ZDNet, PC Magazine and Discovery Magazine.Margaret's idea of a fun day is helping IT and business professionals learn to speak each other’s highly specialized languages. If you have a suggestion for a new definition or how to improve a technical explanation, please email Margaret or contact her…