Turn a width × height (e.g. 1920×1080) into its simplified aspect ratio (16:9), or expand a ratio into resolutions.
Design • ratio
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Aspect ratio is the proportional relationship between width and height — 1920×1080 simplifies to 16:9, the standard for HD/4K video and most monitors. Knowing the ratio matters for video editing, photography, web design and fitting content to screens without stretching or black bars.
Enter a resolution to get its simplified ratio, or enter a ratio to get matching resolutions. Instant and browser-based.