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Aspect ratio calculator

Simplify a ratio (1920×1080 → 16:9) and find the missing width or height that keeps it.

AvailableIn your browserInput: Text

How to use: Aspect ratio calculator

  1. Type width and height to see the simplified ratio.
  2. To resize, enter the ratio and the side you know.
  3. Read the missing side, rounded to the pixel.

What it accepts and what you get

Input
Pixel measurements (decimals allowed for ratios like 2.39:1).
Output
Simplified and decimal ratio, nearest common format and the missing size.
Where your data is processed
Your data is processed in your browser and is not sent to our servers.

Limitations and notes

  • A format counts as “common” only within 1 % (for example 1366×768 ≈ 16:9).

Suggested next steps

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