Free 9:16 Aspect Ratio Calculator
Use this calculator to instantly find the matching width or height for a 9:16 aspect ratio (vertical video format).
What is a 9:16 ratio?
A 9:16 ratio means that for every 9 units of width, there are 16 units of height. It is the opposite orientation of the classic widescreen 16:9 format and is commonly used for vertical content on mobile devices.
If you post to TikTok, Instagram Reels, YouTube Shorts, Snapchat, or other mobile-first platforms, 9:16 is usually the best format for full-screen viewing.
9:16 ratio formula
If width is known
Height = Width × (16 ÷ 9)
If height is known
Width = Height × (9 ÷ 16)
Example: If your width is 1080 pixels, the correct 9:16 height is: 1080 × 16 ÷ 9 = 1920 px.
Common 9:16 dimensions
- 360 × 640
- 540 × 960
- 720 × 1280 (HD vertical)
- 1080 × 1920 (Full HD vertical)
- 1440 × 2560 (QHD vertical)
- 2160 × 3840 (4K vertical)
When to use 9:16
- Short-form social videos
- Mobile-first ads
- Vertical motion graphics
- Phone screen mockups and demos
Tips for perfect vertical exports
1) Start with the right canvas
Set your project to 1080 × 1920 (or another 9:16 size) before editing. This avoids unnecessary cropping later.
2) Keep text inside safe zones
Many apps place buttons, captions, and profile info over your video. Keep key text and logos away from extreme top and bottom edges.
3) Avoid scaling tiny footage
Upscaling low-resolution footage can make content soft or blurry. If possible, shoot in high resolution and crop down.
Quick FAQ
Is 1080×1920 exactly 9:16?
Yes. Divide both numbers by 120 and you get 9:16.
Can I convert 16:9 to 9:16?
Yes, but most of the horizontal frame will be cropped. Plan framing carefully if you repurpose landscape videos.
What if my dimensions are close but not exact?
Use the calculator’s Check Current Ratio button. It shows your simplified ratio and how far it is from the true 9:16 aspect ratio.
Bottom line
A 9:16 aspect ratio calculator saves time and prevents formatting mistakes. Enter one dimension, calculate the other, and export with confidence for vertical video platforms.