Aspect Ratio Calculator

Enter any width or height and see calculated dimensions for 16:9, 4:3, 1:1, 21:9, 9:16, and custom ratios. Useful for sizing video embeds, image containers, and responsive layouts. Also converts between common screen resolutions.

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Common Use Cases

Calculate height for a 16:9 video embed
Size image containers for responsive layouts
Convert video resolutions
Design thumbnail dimensions

Frequently Asked Questions

What aspect ratio should I use for video?

16:9 is the universal standard for YouTube, Vimeo, and most screens. 9:16 (vertical) is used for Stories and Reels. 1:1 (square) is popular on Instagram feeds.

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Tool Info

CategorydesignAI EnhancementNoData StorageZero retention