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Find an image's aspect ratio in its simplest form, such as 16:9 or 4:5, from its width and height.
Enter an image's width and height and get its aspect ratio reduced to the simplest whole numbers, so 1920 by 1080 reads as 16:9 and 1080 by 1350 as 4:5. Copy the result straight into CSS or a design brief.
Handy when you are cropping for a social platform, setting an aspect-ratio box so images do not shift the layout as they load, or checking that a supplied asset matches the slot it is going into.
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Aspect ratio 16:9