PPI Calculator (Pixels Per Inch)

How to Use This Calculator

1. Enter the pixel dimensions (width and/or height) of your display or image.
2. Enter the physical dimensions (width and/or height) in inches.
3. The calculator displays PPI for both horizontal and vertical dimensions, plus an average.
4. Use this to compare display sharpness, plan print resolutions, or understand image density.

PPI Formula

Pixels per inch is calculated by dividing pixel dimensions by physical dimensions:

Example: A 1920×1080 display that\'s 13.3" wide: Horizontal PPI = 1920 ÷ 13.3 = 144 PPI. If it\'s 7.5" tall: Vertical PPI = 1080 ÷ 7.5 = 144 PPI. Average = 144 PPI.

Full Description

PPI (Pixels Per Inch) is a crucial metric for understanding display and image quality. It measures pixel density—how many pixels fit in one inch of physical space. Higher PPI means more pixels per inch, resulting in sharper, more detailed images and text. This is why high-resolution displays like Retina screens and 4K monitors look so much better than standard displays.

PPI is important for both displays and prints. For displays, higher PPI provides better image quality and sharper text, though the benefit diminishes beyond normal viewing distances. For prints, PPI (often called DPI) determines print quality—300 DPI is standard for high-quality prints, while lower values work for large format prints viewed from a distance.

This calculator helps you understand the pixel density of your displays, compare different screens, and plan print resolutions. Use it to determine if a display upgrade will provide noticeable quality improvements, or to ensure your images have sufficient resolution for printing at your desired size and quality level.

Frequently Asked Questions