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Aspect Ratio Calculator
Reduce dimensions to a ratio and calculate a matching width or height for a new size.
Ready to useProcesses inputs in your browser
Matching dimensions
1,280 × 720 pxReduced ratio16:9
A link to this result includes the entered numbers in its URL.
Behind the result
About this Tool
Reduce dimensions to a ratio and calculate a matching width or height for a new size.
How it works
Reduces width and height by their greatest common divisor and preserves that ratio while scaling.
A practical way to use it
Convert a 1920×1080 source into the matching height for a 1280-pixel export.
Use results as a practical aid, and verify important decisions against your own source data and qualified guidance.
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