Calculate and convert aspect ratios for images, video, and responsive design.
Runs entirely in your browser.
Aspect Ratio Tool
Preview
16:9
Calculate Ratio
- Width
- Height
- Aspect Ratio
Resize by Ratio
- Ratio
- Known Width
- Calculated Height
- Known Height
- Calculated Width
Common Aspect Ratios
| Ratio | Decimal | Common Use |
|---|---|---|
| 16:9 | 1.778 | HD/4K video, monitors, YouTube |
| 4:3 | 1.333 | Classic TV, iPad, presentations |
| 21:9 | 2.333 | Ultrawide monitors, cinema |
| 1:1 | 1.000 | Instagram square, profile photos |
| 3:2 | 1.500 | DSLR photos, Surface devices |
| 9:16 | 0.563 | Phone portrait, Stories, TikTok |
| 2.39:1 | 2.390 | Anamorphic widescreen cinema |
About Aspect Ratios
Aspect ratios define the proportional relationship between width and height of an image, video, or display.