Find the aspect ratio of a size and calculate a new width or height.
The aspect ratio calculator reduces a width and a height to their simplest ratio, such as 1920 × 1080 = 16:9, and shows the closest common ratio. Enter a new width or height to get the matching other side, so images and videos are resized without distortion.
Useful for responsive images, video embeds, thumbnails, social media posts and screen sizes.
1920 × 1080 becomes 16:9.
Get the height for a new width, or the width for a new height.
Recognizes 16:9, 4:3, 21:9, 1:1, 3:2, 9:16 and more.
See the shape of the ratio.
Both sides are divided by their greatest common divisor: 1920 and 1080 share 120, giving 16:9.
9:16, the vertical format of Stories, Reels and Shorts.
1.91:1, for example 1200 × 630.
Use the aspect-ratio property, e.g. aspect-ratio: 16 / 9.