Aspect Ratio Calculator

The aspect ratio of an image or video describes the proportional relationship between its width and its height. It is commonly written as two numbers separated by a colon, as in 16:9. It is crucial for preventing image stretching across different devices.

16:9 is the standard widescreen dimension for YouTube, TVs, and monitors.
9:16 is increasingly popular for vertical social media (TikTok, Instagram Reels).
1:1 is the classic Instagram square grid.
4:3 is traditional standard definition television.
3:2 is standard for 35mm photography sensors.

In modern web design, you no longer need the "padding bottom hack" to maintain proportions! You can applyaspect-ratio: 16/9; directly to elements like iframe or div. Our calculator provides code snippets you can copy!