Image Aspect Ratio Calculator
Calculate image proportions, simplified aspect ratios and matching dimensions without uploading an image.
Try the tool
Runs in your browserFormula or method
Use the method above to understand how the result is produced. Some tools use text-processing rules rather than mathematical equations.
How to use the Image Aspect Ratio Calculator
Enter original width and height in pixels. Optionally specify a new width to calculate the matching height without distortion.
- Enter the requested values or paste your content into the fields above.
- Choose the appropriate action to calculate, format or preview.
- Review the result and copy or save it when needed.
Worked example
A 1920 × 1080 image has a 16:9 ratio; at 1280 pixels wide it is 720 pixels high.
Use the example as a reference, and replace the sample inputs with your own values.
Frequently asked questions
Does this resize my image?
No. It calculates dimensions only; it does not modify files.
Why preserve aspect ratio?
It helps avoid stretched or squashed visuals.
Can I calculate portrait images?
Yes. Any positive width and height are supported.
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