21:9 Ultrawide Monitor Dimensions
Extra horizontal space for side-by-side windows and wide game views. The 21:9 label covers several actual proportions, so each calculation uses the listed resolution ratio.
Screen sizes in inches and centimeters
| Monitor | Width | Height |
|---|---|---|
| 29″ 21:9 | 26.7 in / 67.9 cm | 11.3 in / 28.6 cm |
| 34″ 21:9 | 31.4 in / 79.7 cm | 13.1 in / 33.3 cm |
| 38″ 21:9 | 35.1 in / 89.1 cm | 14.6 in / 37.1 cm |
| 40″ 21:9 | 36.9 in / 93.6 cm | 15.5 in / 39.5 cm |
Choose a size for its area, pixel density, visual comparison, and the exact proportions used. Measurements are estimates for the visible panel, excluding the bezel and stand.
How to compare this format
Compare height first if you want a familiar text or image size, then width for extra workspace. A larger diagonal can mostly add width. Available desktop workspace also depends on resolution and software scaling.
“21:9” groups multiple proportions: 2560×1080, 3440×1440, 3840×1600, and 5120×2160 are not all the same ratio. Each linked page states which resolution shape its dimensions represent.
For curved models, verify the manufacturer's straight-line width and complete desk footprint. The calculations describe flat-equivalent panel geometry.