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Aspect Ratio Calculator
Simplify dimensions and calculate proportional width or height exactly.
How this tool works
The source width and height are divided by their greatest common divisor to produce the simplest integer ratio. A target width is then scaled by the original height-to-width relationship.
Tested examples
01
Input1920 × 1080 with target width 1280
Expected result16:9 ratio and 1280 × 720 target dimensions.
02
Input1080 × 1080 with target width 500
Expected result1:1 ratio and 500 × 500 target dimensions.