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Aspect Ratio Simplifier
Convert dimensions such as 1920 × 1080 into a simplified ratio like 16:9. This free calculator runs in your browser and does not upload your values.
Simplify a width and height
Enter pixel dimensions or any two positive numbers.
Simplified result
How ratio simplification works
Find the greatest common divisor (GCD) of the width and height, then divide both values by it. For 1920 × 1080, the GCD is 120, so the simplified ratio is 16:9. This changes the way the ratio is written, not the image dimensions or quality.
For dimensions that do not reduce to whole-number parts, this tool still gives the exact simplified integer ratio when both inputs are whole numbers.
Try these common dimensions
Frequently asked questions
Is aspect ratio the same as resolution?
No. Resolution is the pixel width and height; aspect ratio describes their proportional relationship. Many different resolutions can share a 16:9 ratio.
Does simplifying resize my image?
No. It only expresses the same proportions using smaller whole numbers.
Next: Aspect Ratio Calculator · CSS Aspect-Ratio Generator · Image Resize Calculator.