Aspect Ratio

Aspect ratio is the proportional relationship between an image or video's width and height, written as width:height — like 16:9, 9:16, or 1:1.

Formula

Aspect ratio = Width : Height (e.g. 1920 × 1080 = 16:9)

Aspect ratio defines an asset's shape independent of its pixel size. 16:9 is standard widescreen (YouTube, TVs); 9:16 is vertical for Reels, TikTok, and Stories; 1:1 is square; 4:5 is the tall portrait that performs best in the Instagram feed.

To resize without distorting, keep the ratio constant — scale width and height by the same factor. Publishing in the wrong ratio for a platform means letterbox bars or cropped-off edges, so match the ratio to where the content will live.

Related free tools

Aspect Ratio Calculator

Related terms

Text-to-Video Upscaling (AI)

Frequently asked questions

What is Aspect Ratio?

Aspect ratio is the proportional relationship between an image or video's width and height, written as width:height — like 16:9, 9:16, or 1:1. Aspect ratio defines an asset's shape independent of its pixel size. 16:9 is standard widescreen (YouTube, TVs); 9:16 is vertical for Reels, TikTok, and Stories; 1:1 is square; 4:5 is the tall portrait that performs best in the Instagram feed.

How is Aspect Ratio calculated?

Aspect Ratio is calculated as: Aspect ratio = Width : Height (e.g. 1920 × 1080 = 16:9).

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