Aspect Ratio Calculator
Calculate aspect ratio from width and height, or find missing dimension for a target ratio. Useful for images, video, and UI.
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Tool guide
Aspect Ratio Calculator: how it works
Practical information to understand the result and use this tool correctly.
About Aspect Ratio Calculator
Calculate aspect ratio from width and height, or find missing dimension for a target ratio. Useful for images, video, and UI.
The tool runs directly in the browser for immediate results.
How to use it
- 1Enter the values you want to calculate or process.
- 2The result updates instantly on the same page.
- 3Copy, share, or export the result if the tool allows it.
Frequently asked questions
- Do I need to sign up?
- No. The tool works without an account.
- Are my data uploaded?
- Compatible operations run locally in the browser.
- How is aspect ratio calculated?
- Aspect ratio = width / height, simplified to the smallest integers (e.g. 1920×1080 = 16:9).
- Can I calculate one side from the other?
- Yes. Enter one dimension and a target ratio to get the other side.