What is the 9:16 Aspect Ratio?
The 9:16 aspect ratio is a vertical rectangle – 9 units wide for every 16 units tall. It's the standard for full-screen vertical video on TikTok, Instagram Reels, YouTube Shorts, and Snapchat.
As smartphone usage dominates, 9:16 has become the default for mobile-first content. It fills the phone screen perfectly, eliminating black bars and capturing more attention.
If you're creating content for Stories or vertical ads, sticking to 9:16 ensures your video or image looks native on mobile devices.
Common 9:16 Resolutions
These are the most common vertical pixel dimensions.
| Resolution | Width | Height | Pixel Count |
|---|---|---|---|
| Vertical HD | 720 | 1280 | 921,600 |
| Full HD vertical / 1080p | 1080 | 1920 | 2,073,600 |
| 4K vertical | 2160 | 3840 | 8,294,400 |
| 8K vertical | 4320 | 7680 | 33,177,600 |
Why Use a 9:16 Calculator?
Use this calculator to quickly determine the correct pixel dimensions for vertical videos, stories, and mobile ads. Enter one dimension and it instantly finds the other while keeping the 9:16 proportion.
Maintaining 9:16 prevents awkward cropping or stretching when uploading to platforms like TikTok, Reels, and Shorts.