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Pixel Ratio

Published Date: 26 December 2022

What is a Pixel Ratio?

Pixel Ratio (Pixel Aspect Ratio or PAR) describes the relationship between the width and height of a pixel in a digital image. It is a mathematical ratio of the individual pixels that constitute an image.

For square pixels, the pixel aspect ratio would be 1:1, whereas, for rectangular pixels, the pixel ratio would be 4:3 or 16:9.

Since the pixel aspect ratio represents the proportions of a digital image and not its size, different images have the same aspect ratio irrespective of their sizes. For instance, a 480×480p image will have an aspect ratio of 1:1—the same as a 1080×1080p image.

The Role of Pixel Ratio

  • Pixel aspect ratios promote optimal viewing experiences on different devices by ensuring videos and images are displayed best.
  • It is a key determinant of how videos will appear on wide-screen monitors, mobile devices, etc.
  • High-quality images, graphics, illustrations, and videos on your website enhance your overall UX design and boost engagement.
  • Disoriented images that are squashed or poorly edited negatively impact on-site visitors and prevent optimal usability.

How to set the pixel aspect ratio?

  • A host of online aspect ratio calculators can help you calculate the correct aspect ratio of images for the best results.
  • Plenty of video editing tools like Photoshop and Canva also have a library of templates for social media posts, stories, banners, etc.

Related Terms

Video Quality

In simple terms, video quality is the characteristic of a video that determines how clear, crisp, and detailed the video transmitted to the viewer is.

Video Watermark

A video watermark is a digital copyright tool used to identify the video's copyright owner or prevent illegal distribution.


1:1 is a commonly used aspect ratio in videography. It produces videos that are a perfect square; the width and height of the video image are the same.

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