Aspect Ratio Calculator

Calculate aspect ratios from width and height, or find the missing dimension given an aspect ratio. Perfect for responsive design, video production, and image resizing.

×

16:9

Aspect Ratio

Decimal: 1.7778

1920×1080

How to Use Aspect Ratio Calculator

  1. Paste or enter your data in the input field above.
  2. The result appears instantly — no button press needed.
  3. Copy the output to your clipboard with one click.

Frequently Asked Questions

What is aspect ratio?
Aspect ratio is the proportional relationship between width and height. Common ratios include 16:9 (widescreen), 4:3 (standard), and 1:1 (square).

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