Aspect ratio calculator
Enter a width and height to get the simplified ratio, or pick a ratio and one side to get the other. Useful for video exports, thumbnails, prints and AI image settings.
Ratio 16:9
Scale it
Do it with AI Image extender Wrong shape, and cropping would cut something out? The AI image extender grows the picture to the new size instead. See image extender results → Aspect ratio calculator in three steps
- 1
Enter a size
Width and height in pixels, or any unit.
- 2
Read the ratio
It is simplified automatically, with the closest common ratio.
- 3
Scale it
Type a new width or height and get the matching other side.
Aspect ratio calculator: questions
What aspect ratio is 1920 x 1080?
16:9, the standard for HD and 4K video and most screens. Its vertical twin, 1080 x 1920, is 9:16, used by Stories, Reels and TikTok.
What ratio should I use for AI images?
Match where it will be seen: 9:16 for Stories and Reels, 4:5 for Instagram feed posts, 1:1 for profile pictures, 16:9 for YouTube and desktop wallpapers.
What is the ratio of a print?
A 4x6 inch print is 2:3, an 8x10 is 4:5, and A-series paper sizes (A4, A3) are about 1:1.414.
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