Reference guide with common aspect ratios, their uses, and a calculator to find the ratio from dimensions.
| Ratio | Decimal | Common Uses |
|---|---|---|
| 1:1 | 1.000 | Instagram posts, square photos, profile pictures |
| 4:3 | 1.333 | Classic TV, older cameras, some phones |
| 3:2 | 1.500 | 35mm film, DSLR photos, many cameras |
| 16:10 | 1.600 | Widescreen monitors, productivity displays |
| 16:9 | 1.778 | HD video, YouTube, modern TV, monitors |
| 21:9 | 2.333 | Ultra-wide monitors, cinema |
| 4:5 | 0.800 | Instagram portrait, TikTok |
| 9:16 | 0.562 | TikTok, Reels, Stories, vertical video |
| 2.39:1 | 2.390 | Anamorphic cinema, Scope aspect ratio |
| 3:4 | 0.750 | Portrait photos, Pinterest |