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Aspect Ratio Calculator

Simplify any width and height into a clean aspect ratio.

Your files stay on your deviceNo signup requiredNo watermarkFree browser-based tools

Aspect ratio

16:9(1.7778)

Widescreen (16:9)

How it works

  1. Enter a width and height.
  2. YesDPI simplifies it to the smallest whole-number ratio.
  3. See if it matches a common ratio name.

The ratio is simplified by dividing both values by their greatest common divisor (GCD). For example, 1920×1080 simplifies to 16:9.

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FAQ

How is an aspect ratio simplified?

Width and height are divided by their greatest common divisor, giving the smallest whole-number ratio that represents the same proportions.

Why does my ratio not match a common name?

Many images use ratios that don't correspond to a standard preset like 16:9 or 4:3 — that's normal, especially for cropped or custom-sized images.