Aspect Ratio Calculator
Calculate width or height when resizing images or designing layouts. Works with any aspect ratio — 16:9, 4:3, 1:1, or custom.
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Common Aspect Ratios
| Ratio | Common Use | Example (1920px wide) |
|---|---|---|
| 16:9 | HD/4K video, monitors, YouTube | 1920 × 1080 |
| 4:3 | Old TV, presentations, iPads | 1920 × 1440 |
| 1:1 | Instagram square, profile photos | 1920 × 1920 |
| 3:2 | DSLR photos, 35mm film | 1920 × 1280 |
| 21:9 | Ultrawide monitors, cinema | 1920 × 823 |
| 9:16 | Mobile video, TikTok, Reels | 1080 × 1920 |
| 4:5 | Instagram portrait posts | 1080 × 1350 |
| 1.91:1 | Open Graph / Facebook link images | 1200 × 630 |
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