Aspect Ratio Simplifier
Simplify a width and height into its lowest-terms aspect ratio, like 1920x1080 to 16:9.
From dimensions to a clean ratio
An aspect ratio is the proportion of width to height, and dimensions like 1920 by 1080 hide a familiar ratio — 16:9 — once you reduce them. This simplifies any width and height to their lowest-terms ratio, so you can identify a screen or image's proportions, check whether two sizes share a ratio, or express dimensions in the clean form designers and video use.
Enter a width and height and see the simplified ratio.
Why the ratio matters more than the size
The aspect ratio, not the exact pixel count, is what determines whether content fits a space without stretching or black bars. Two images at different resolutions but the same ratio scale into each other cleanly; a mismatch is what causes distortion or letterboxing. Reducing dimensions to their simplest ratio — the same maths as simplifying a fraction — reveals whether you are dealing with a widescreen 16:9, a square 1:1, an older 4:3, or something custom. It is the quick way to check that things will fit together properly before they do not.
Frequently asked questions
How is the ratio simplified?
By reducing the width and height to their lowest terms, the same as simplifying a fraction — so 1920 by 1080 becomes 16:9.
Why does aspect ratio matter more than resolution?
Because it decides whether content fits a space without stretching or black bars; matching ratios scale cleanly, mismatched ones distort.
Is anything uploaded?
No. The calculation happens in your browser.