Widescreen 1.78:1 aspect ratio cheat sheet with the correct resolutions for most standard video container sizes, including Standard HD 720p, Full HD 1080p, 4K UHD and all the way up to 8K.

The 1.78:1 aspect ratio, commonly known as 16:9 aspect ratio, is a widescreen aspect ratio with a width of 16 units and a height of 9 units. Dividing 16 by 9 results in a width to height ratio of 1.77 (generally rounded up to 1.78).

1.78:1 (or 16:9) is the most common aspect for televisions and computer monitors, and the international standard image format for UHD, HDTV, Full HD and SD digital television. It is the most popular choice for modern content, from YouTube videos to HDTV.

Historically, engineers developed this aspect ratio because it fell nicely between the 4:3 aspect ratio of standard TVs and the 2:35 ratio of many feature films of the time, so an HDTV set could display both sizes of video without significant letterboxing. DVDs, Blu-ray, and 4K video all inherited this ratio, which is now the standard for most television production today.

To calculate this aspect ratio, divide the width of your source footage by 1.78. The resulting value will be the required height (for more accuracy, divide by 1.7777).

To make life a little easier, we’ve uploaded this 1.78:1 resolution cheat sheet, which includes the correct dimensions for the following video formats:

8K = 8192x4608
8K UHD = 7680x4320
6K = 6144x3456
5K = 5120x2880
4K = 4096x2304
4K UHD = 3840x2160
3K = 3072x1728
3K UHD = 2880x1620
2K = 2048x1152
Full HD 1080p = 1920x1080
HD 720p = 1280x720

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