INTERACTIVE TOOL
Aspect ratio calculator
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How to use this tool
- Enter original width and height.
- Change output width or height.
- Review the calculated dimension to preserve proportions.
Automatic answerThe result updates while you change the fields.
Worked example
A 1920-by-1080 image preserves 16:9 at 1280 by 720.
Assumptions and limits
This calculates dimensions; it does not resize, crop or enhance an image file.
Frequently asked questions
What does 16:9 mean?+
For every sixteen units of width there are nine units of height.
What happens to my inputs?+
Calculation inputs are processed locally in your browser. Favorites and preferences may be saved on this device. The site may perform separate network requests for live panels; these do not include the values entered into this local calculator. Do not paste secrets into public tools.
How should I check the result?+
This calculates dimensions; it does not resize, crop or enhance an image file.