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Aspect Ratio Calculator

Simplify any width and height to their lowest common aspect ratio. Also outputs the CSS padding-top percentage for the intrinsic ratio technique.

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When would you use this?

Enter any width and height and this calculator simplifies them to their lowest common ratio. So 1920x1080 becomes 16:9, 1200x900 becomes 4:3, and so on. It also generates the padding-top percentage for the classic CSS intrinsic ratio trick, which is still useful for maintaining aspect ratios on responsive images and embeds in older codebases.

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