How is the ratio simplified?

It divides both the width and height by their greatest common divisor, the same way you'd simplify a fraction — 1920×1080 becomes 16:9.

What's the decimal value for?

It's useful when a simplified whole-number ratio isn't clean (like 1.91:1 for some social media formats) — the decimal gives you the precise value.

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Upload an image, or enter dimensions manually, to get its simplified aspect ratio.

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Or enter dimensions manually:

Width (px)

Height (px)

Aspect ratio

16 : 9

Decimal: 1.7778

No — if you upload an image, it's read entirely in your browser using JavaScript. It's never uploaded to a server.

How is the ratio simplified?: It divides both the width and height by their greatest common divisor, the same way you'd simplify a fraction — 1920×1080 becomes 16:9.
What's the decimal value for?: It's useful when a simplified whole-number ratio isn't clean (like 1.91:1 for some social media formats) — the decimal gives you the precise value.

Built by Ni Wayan Astari — Performance Marketer with a strong interest in data and technology. See more free tools or selected work.