9:16 Aspect Ratio Calculator
9:16 is the vertical (portrait) video format of mobile-first platforms: Instagram Reels, YouTube Shorts, TikTok and phone wallpapers. It is simply 16:9 rotated 90 degrees.
Ratio locked to 9:16. Enter either side, get the other.
Enter a width or height above.
Common 9:16 sizes
| Pixels | Usage |
|---|---|
| 720×1280 | HD vertical |
| 1080×1920 | Full HD vertical (Reels/Shorts/TikTok) |
| 1440×2560 | QHD vertical |
| 2160×3840 | 4K vertical |
Frequently asked questions
What size is a TikTok or Reels video?
1080×1920 pixels at 9:16. All major vertical platforms — TikTok, Instagram Reels, YouTube Shorts — use the same 9:16 full-screen format.
Is 9:16 the same as 16:9?
They are the same ratio, just rotated: 9:16 is portrait, 16:9 is landscape. Swapping the two numbers converts one to the other.
Why is vertical video so popular?
Phones are held upright 90% of the time. Vertical video fills the entire screen without rotation, so platforms designed their formats around 9:16.