Enter a width in this calculator
Set original width 9 and height 16, then enter New width 1080 to get height 1920. The interface has no new-height input. If height is fixed at 1280, calculate 1280 × 9 ÷ 16 = 720 for width. Round carefully and use even values for Mediaivo video tools.
A 9:16 frame can use many resolutions; 1080 × 1920 is a common vertical example, while any width and height that reduce to 9:16 share the same shape. The calculator helps find matching dimensions when you know one side.
Calculate a matching 9:16 dimension
Enter a known width and height or derive the matching side while preserving the vertical ratio.
How 9:16 dimensions work
Aspect ratio compares width with height. In 9:16 vertical media, the height is substantially greater than the width, which fits portrait phone screens.
To calculate a matching height from a width, multiply the width by 16 and divide by 9. To calculate a matching width from a height, multiply the height by 9 and divide by 16.
Rounding can produce a non-integer result for arbitrary values. Choose a practical whole-pixel value, and use even dimensions for video when the encoder requires them.
How to calculate 9:16 dimensions with Mediaivo
- Choose the side you know
Start from the required width or height for your destination.
- Apply the 9:16 ratio
Use the calculator to derive the matching dimension instead of guessing.
- Round appropriately
Use whole pixels and prefer even values for video workflows when needed.
- Resize or crop intentionally
Preserve the ratio when resizing, or crop if the source composition is a different shape.
Common examples of 9:16 dimensions
All of these share the same portrait shape but contain different amounts of detail.
| Situation | Recommended choice | Check before publishing |
|---|---|---|
| 1080 × 1920 | Common high-quality vertical delivery size | Good practical master for many short-form workflows. |
| 720 × 1280 | Smaller 9:16 resolution | Use when the destination or bandwidth requirement supports it. |
| 540 × 960 | Lightweight 9:16 output | Inspect text and detail because lower resolution can become soft. |
Aspect ratio does not guarantee composition
A landscape source cannot become a good vertical composition just because the output numbers are 9:16. You may need to crop, reposition or redesign the frame around the important subject.
Likewise, larger 9:16 dimensions do not improve a low-resolution source. Upscaling preserves the shape but does not recreate missing detail.
Common mistakes to avoid
1. Treating 9:16 as one pixel size
Many resolutions share the same aspect ratio.
2. Stretching a 16:9 source
Use cropping or a designed background to change composition.
3. Ignoring even dimensions
Some video encoders work best with even width and height values.
4. Upscaling tiny media
More pixels do not automatically mean more real detail.
Final check before downloading or publishing
- The width and height reduce to 9:16.
- The source is not stretched.
- Video dimensions are encoder-friendly.
- Important content fits the portrait crop.
- Text remains readable at the chosen resolution.
Frequently asked questions
Is 1080 × 1920 exactly 9:16?
Yes. Dividing both numbers by 120 gives 9 × 16.
Is 720 × 1280 also 9:16?
Yes. It has the same shape at a lower resolution.
How do I find the 9:16 height from width?
Multiply the width by 16 and divide by 9, then round to an appropriate whole-pixel value.
Can I make any video 9:16?
Yes technically, but a different source shape requires cropping, padding or layout changes to avoid distortion.
Calculate the shape before resizing
Preserve 9:16 mathematically, then make sure the composition actually works in portrait.