Common aspect ratios
| Ratio | Typical uses | Example sizes |
|---|---|---|
| 16:9 | TV, YouTube, monitors | 1920×1080, 3840×2160 |
| 4:3 | Old TV, iPad, slides | 1024×768, 2048×1536 |
| 21:9 | Ultrawide monitors | 2560×1080, 3440×1440 |
| 1:1 | Square posts, avatars | 1080×1080 |
| 9:16 | Stories, Shorts, Reels | 1080×1920 |
| 3:2 | DSLR photos | 6000×4000 |
Simplify by dividing both numbers by their greatest common divisor: 1920÷120 = 16 and 1080÷120 = 9, so 1920×1080 is 16:9.