How aspect ratio calculator works
Reduces integer width and height by their GCD to express the simplest ratio.
Try an example
1920 × 1080 → 16:9.
Good to know
Positive safe-integer dimensions only. This is a numeric tool; no image is required.
Your privacy
Processing happens on this device. We do not upload your input, put it in share links or save it to your favourites. Closing this tab discards the working input; downloaded results remain wherever you save them.