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Image Aspect Ratio Calculator

Calculate responsive 16:9, 4:3, 1:1, 21:9 image dimensions or custom aspect ratios for web graphics.

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Detailed Guide & Use Cases

How Image Aspect Ratio Calculator works and best practices

Calculate proportional image and video dimensions based on standard aspect ratios (16:9 widescreen, 4:3 classic, 1:1 square, 21:9 ultrawide, 9:16 vertical stories).

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Frequently Asked Questions (FAQ)

Common questions about Image Aspect Ratio Calculator

Standard YouTube widescreen video uses 16:9, whereas Instagram Reels and TikTok videos use 9:16.
Yes, enter any custom original width:height ratio to compute missing dimension variables.
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