Aspect Ratio Calculator

Simplify width/height to ratios like 16:9. Get pixels for target sizes.

How to Use

  1. Enter width and height.
  2. See simplified ratio and preset match.
  3. Enter target width for pixel dimensions.

Aspect ratio math

Ratio = Width ÷ Height, simplified via GCD. Target height = Target width ÷ (Width ÷ Height). Common presets: 16:9 video, 4:3 legacy, 1:1 social squares.

Frequently Asked Questions

How is aspect ratio simplified?
We divide width and height by their greatest common divisor (GCD) to get the simplest ratio like 16:9.
Can I resize to a target width?
Yes — enter a target width in pixels and we calculate the proportional height.

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