Aspect Ratio
The proportional relationship between a video's width and height, such as 16:9 or 9:16.
Aspect ratio is the ratio of a frame's width to its height. Common ratios include 16:9 (widescreen, standard for YouTube and desktop), 9:16 (vertical, for Stories, Reels, and TikTok), 1:1 (square, for feeds), and 4:5 (portrait, for Instagram).
Choosing the right aspect ratio up front matters because it determines how your composition is framed for its destination. Our free helps you find exact pixel dimensions for any ratio.
See also: , .
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16:9 for widescreen (YouTube, desktop), 9:16 for vertical (Stories, Reels, TikTok), 1:1 for square feed posts, and 4:5 for portrait feed posts.
It determines how your composition is framed for its destination. Designing for the wrong ratio leads to cropping or letterboxing later. Our free Aspect Ratio Calculator finds exact pixel sizes for any ratio.