Widescreen ratio calculator
16:9 is the standard widescreen shape for video, presentation slides, livestream layouts, and many thumbnails.
Live preview follows the selected ratio.
Calculator
Choose a ratio, enter width or height, and the calculator fills the matching dimension while keeping the image or video proportional.
Use these sizes as starting points. Exact platform requirements can change, so treat the calculator as the proportional reference and check the final upload screen before publishing.
| Use case | Pixel size | Ratio |
|---|---|---|
| HD | 1280 x 720 | 16:9 |
| Full HD | 1920 x 1080 | 16:9 |
| QHD | 2560 x 1440 | 16:9 |
| 4K UHD | 3840 x 2160 | 16:9 |
The table below updates when you choose a new ratio. It is useful for planning responsive images, thumbnails, and video exports.
| Width | Matching height | Size |
|---|
Use 16:9 for most horizontal video exports.
Avoid cropping portraits into 16:9 without checking the subject.
For slides, keep text inside a safe margin.
This reference chart shows how common frames compare. Use it when deciding whether a creative should be wide, square, portrait, or ultrawide.
