Calculate dimensions and ratios for video, images, and screens.
Enter a ratio and one dimension. The other is calculated.
| Ratio | Common Resolutions | Use Case |
|---|---|---|
| 16:9 | 1920×1080, 2560×1440, 3840×2160 | YouTube, TV, monitors |
| 4:3 | 1024×768, 1600×1200 | Old TV, iPad, presentations |
| 1:1 | 1080×1080 | Instagram posts |
| 9:16 | 1080×1920 | TikTok, Reels, Stories |
| 21:9 | 2560×1080, 3440×1440 | Ultrawide monitors, cinema |
| 3:2 | 2160×1440 | Surface, photography |
Aspect ratio is the proportional relationship between width and height. A 16:9 ratio means for every 16 units of width, there are 9 units of height. It does not specify actual pixel dimensions — both 1920×1080 and 3840×2160 are 16:9.
Image Resizer · Image Compressor · Screen Test · Unit Converter