9:16 Aspect Ratio Calculator
Use this 9:16 aspect ratio guide to understand vertical video dimensions, common portrait resolutions, and how to convert sizes for Stories, Reels, Shorts, and mobile-first content.
What is 9:16?
9:16 is the standard vertical video aspect ratio for mobile-first content. It is the most common format for Instagram Reels, Stories, YouTube Shorts, Facebook Stories, and other portrait-native placements. If a platform is designed to be consumed vertically on a phone, 9:16 is usually your best default starting point.
Common 9:16 resolutions
- 720×1280
- 1080×1920
- 1440×2560
- 2160×3840
Where 9:16 is used
- Instagram Reels and Stories
- YouTube Shorts
- Facebook Stories and Reels
- Mobile-first social ads
- Portrait video content for phones
How to calculate 9:16 dimensions
To calculate 9:16 dimensions, keep the width-to-height relationship locked at 9 units wide for every 16 units high. For example, if your width is 1080, the matching height is 1920. If your height is 1280, the matching width is 720. The calculator makes this easier by letting you enter one number and generate the matching dimension.
9:16 vs other common aspect ratios
Compared with 16:9, 9:16 is the vertical version used for portrait video. Compared with 4:5 and 1:1, it fills more of the screen on full-height mobile placements and is better for immersive video viewing.
If your content is meant for Reels, Stories, Shorts, or similar vertical platforms, 9:16 is the safest default ratio to start with.
Frequently asked questions
What is 9:16?
9:16 is a vertical aspect ratio used for portrait-first content like Instagram Reels, Stories, YouTube Shorts, TikTok-style video, and mobile-first ads.
Is 1080×1920 a 9:16 resolution?
Yes. 1080×1920 simplifies to 9:16 and is the standard Full HD vertical video resolution.
What is 9:16 used for?
9:16 is used for vertical video content, including Instagram Reels, Stories, YouTube Shorts, Facebook Stories, and many mobile-first social media placements.
What is the difference between 9:16 and 16:9?
9:16 is a vertical portrait format, while 16:9 is a horizontal widescreen format. They are inverse versions of the same proportional relationship.