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9:16 Aspect Ratio Calculator
A tall portrait frame commonly used for vertical video and full-screen mobile-first creative. Enter a width or height to calculate the matching dimension, or choose a common pixel size below.
Portrait · exact proportion
Calculate 9:16 dimensions
Change either field. The other dimension updates immediately to preserve the selected ratio.
Load a common size
Common 9:16 dimensions
These sizes preserve an exact 9:16 proportion. Select any row to load it into the calculator.
| Dimensions | Common label / use | Action |
|---|---|---|
| 720 × 1280 | HD vertical | |
| 1080 × 1920 | Full HD vertical | |
| 1440 × 2560 | QHD vertical | |
| 2160 × 3840 | 4K vertical |
What does 9:16 mean?
An aspect ratio describes the relationship between width and height, not the number of pixels. A smaller and a larger image can have the same ratio when their dimensions scale proportionally.
Formula: height = width × 16 ÷ 9. For a known height, width = height × 9 ÷ 16. Keep both dimensions in the same unit.
Where 9:16 is useful
- Vertical short-form videos and stories
- Portrait video recorded on a phone
- Full-screen mobile creative
- Tall designs where the subject is composed vertically
Ratio versus resolution
The ratio describes shape; resolution describes pixel dimensions. A frame can be the right shape but too small for your intended use. Conversely, a high-resolution image can still need cropping if its shape does not match the target.
Resizing without distortion
Scale width and height by the same factor to preserve the source ratio. If the source ratio differs from 9:16, choose between cropping to fill the frame or fitting the whole image with possible empty space. Do not stretch the image unevenly.
Frequently asked questions
What is 9:16 used for?
It is a common portrait video shape for short-form video and stories.
How do I calculate 9:16 width?
Multiply the height by 9 and divide by 16.
Does a 9:16 ratio guarantee platform compliance?
No. Platform placement rules and safe areas can vary, so check the current specification for the destination.
Explore related tools and ratios
Choose a related ratio or continue to an image tool depending on what you need next.