Aspect Ratio Calculator

Calculate & convert aspect ratios

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About Aspect Ratio Calculator

An aspect ratio calculator that finds the aspect ratio from any width and height, calculates missing dimensions given a ratio, and scales proportionally. Supports common presets (16:9, 4:3, 21:9, 1:1) and custom ratios. Shows GCD-reduced ratios, pixel counts, and common use cases for each ratio. Essential for video editors, photographers, web designers, and UI developers working with responsive layouts.

Aspect Ratio Calculator Features

  • Ratio detection
  • Dimension calculator
  • Common presets
  • Proportional scaling
  • Pixel count

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