Try a real creator scenario
Enter 1080 × 1920 to get 9:16, then enter a target width of 720 to calculate 1280px high.
Local creator utility
Aspect Ratio Calculator
Simplify any width and height, then project a matching target dimension without stretching.
Local processingData pending verification. Use as a rough preview only.Best-effort guidance
Local processingYour file is processed locally in your browser and never uploaded.
01 · Input
Source dimensions
Quick presets
02 · Visualize
Proportion stage
9:16
Live output
Result inspector
Simplified ratio9:16
Change either source dimension to recalculate instantly.
Avoid preventable rework
- Mixing portrait and landscape values
- Rounding both dimensions independently
- Stretching instead of cropping
How it works
A private, repeatable browser workflow
01 · Add input
Enter dimensions, text, or choose a supported local image.
02 · Inspect
The browser calculates or renders the result without a remote request.
03 · Continue
Copy the result, download the image, or open the Safe Zone Checker.
| Check | What to review | Why it matters |
|---|---|---|
| Input | Non-empty, positive values or a supported image | Prevents invalid dimensions and browser decoding errors. |
| Output | Dimensions, ratio, quality, and visual crop | Confirms the transform matches the intended placement. |
| Final preview | Current publishing or ads surface | Platform behavior can change after this tool is reviewed. |
Clear answers
Questions creators ask
Practical notes for a faster, more confident pre-publish check.
What is an aspect ratio?
It is the proportional relationship between width and height, independent of the final pixel size.
Does a matching ratio guarantee a perfect platform fit?
No. A matching canvas ratio helps, but interface overlays and placement-specific crops still need checking.
Why did my ratio simplify?
The calculator divides width and height by their greatest common divisor, such as 1080:1920 becoming 9:16.
Keep the workflow moving
Related tools & templates
Last reviewed
2026-07-16
Data pending verification. Use as a rough preview only.
Best-effort safe zone preview. Always verify in the platform preview before publishing or running ads.