Free 9:16 Aspect Ratio Calculator
Enter either width or height (or both) and calculate dimensions that match the vertical 9:16 ratio.
Tip: Fill one field and leave the other blank for fastest results.
The 9:16 aspect ratio is now one of the most important video and design formats on the internet. If you create content for TikTok, Instagram Reels, YouTube Shorts, Snapchat, or mobile-first ads, this calculator helps you instantly convert width and height without guessing.
What is a 9:16 aspect ratio?
A 9:16 aspect ratio means the frame is 9 units wide and 16 units tall. It is a vertical format (portrait orientation), essentially the rotated opposite of 16:9 widescreen.
- 16:9 = landscape (horizontal)
- 9:16 = portrait (vertical)
On phones, 9:16 fills the screen naturally when users hold devices upright, which is why it performs so well for short-form video content.
How this calculator works
Formula
For 9:16 ratio calculations:
- Height = Width × (16 ÷ 9)
- Width = Height × (9 ÷ 16)
Example: If width is 1080, then height is 1080 × 16/9 = 1920.
When to use each button
- Calculate Missing Dimension: Best when you know only width or only height.
- Check Current Ratio: Confirms whether your current values are true 9:16 and shows how far off they are.
- Clear: Resets everything.
Common 9:16 resolutions
- 360 × 640
- 540 × 960
- 720 × 1280
- 1080 × 1920 (most common for social video)
- 1440 × 2560
- 2160 × 3840 (4K vertical)
As long as your width and height keep the same 9:16 ratio, your file is proportionally correct.
Best practices for vertical video creators
1) Start with a 1080 × 1920 canvas
This gives you a quality baseline that is widely accepted across social platforms.
2) Keep text away from edges
Some interfaces overlay buttons and captions. Maintain safe margins so key content is never hidden.
3) Export with platform-friendly settings
Use modern codecs and reasonable bitrates. Keep file size efficient without sacrificing readability, especially for motion and text-heavy clips.
4) Avoid stretching footage
If source footage is not 9:16, crop or reframe instead of stretching. Distortion can make videos look unprofessional.
9:16 ratio FAQ
Is 1080 × 1920 always required?
No. It is common, but any correctly scaled 9:16 resolution works.
Can I convert 16:9 into 9:16?
Yes. Usually this means cropping the sides or reframing key subjects into a vertical composition.
Does aspect ratio affect quality?
Aspect ratio itself is shape, not quality. Quality depends on total resolution, bitrate, compression, and source material.
Final thoughts
If you work with short-form video, understanding aspect ratio saves time and prevents export mistakes. Use this 9:16 calculator anytime you need quick dimension math for vertical posts, stories, reels, shorts, ad creatives, or mobile app screens.