Pixel Aspect Ratio Calculator

Created by Mariamy Chrdileli
Reviewed by Wojciech Sas, PhD
Last updated: Feb 02, 2023

Welcome to the Omni pixel aspect ratio calculator, an easy-to-use tool you can utilize to adjust your images or videos to desired aspect ratios.

Whether you're a photographer, videographer, or editing enthusiast, you probably had to meet the challenge of converting your content into different mediums. Adapting files to various aspect ratios can get confusing, but don't worry; the pixel aspect ratio calculator is here to help! Come along to learn more about the pixel aspect ratio, how to calculate the pixel aspect ratio (e.g., how to convert files into 4:3 pixel aspect ratio), and even how to adapt your images to fit the widescreen pixel aspect ratio.

Pixel apsect ratio

Pixel aspect ratio (PAR) is a proportional relationship of image pixels, in other words, the ratio of a pixel's width to its height. For instance, the pixel aspect ratio of 2:1 would indicate that each pixel is twice as wide as its height. Most digital images have square pixels with an aspect ratio of 1:1, although some use rectangular aspect ratios with the purpose of fitting standard-definition television, also known as SDTV.

How do I calculate pixel aspect ratio?

The formula to calculate the aspect ratio is as follows:

aspect ratio = pixel width / pixel height

Therefore, if you're trying to adapt your image to a particular aspect ratio, the calculation will depend on the aspect ratio to which you're trying to adapt your image or video. For instance:

  • If you're trying to adapt your file to a 4:5 pixel aspect ratio, you should use the following formula:

    4/5 = pixel width / pixel height

  • If you are trying to adapt your image to the 16:9 pixel aspect ratio (widescreen), you should use the following formula:

    16/9 = pixel width / pixel height

Don't want to perform calculations by hand? That's where the pixel aspect ratio calculator comes into play. Trust our handy tool to do all the work for you!


What does 4:5 pixel aspect ratio indicate?

4:5 pixel ratio indicates that the pixel is four units wide by five units high. Since aspect ratios can affect how the image is displayed on the screen, optimizing images to specific aspect ratios can be critical.

How do I know if I have widescreen pixel aspect ratio?

To determine whether you have a widescreen aspect ratio:

  1. Measure the height and width of your image;
  2. Divide the width of your image by the height.
  3. Check if your aspect ratio corresponds to 16:9 or 1.78.
Mariamy Chrdileli
Rectangles of various aspect ratios
Aspect ratio
Pixel width
Pixel height
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