Resolution guide
What Aspect Ratio Is 3440 x 1440?
3440 x 1440 is an ultrawide landscape frame marketed as 21:9. Its exact simplified ratio is 43:18, or 2.389:1, because both dimensions divide by 80.
How it simplifies to 43:18
The greatest common divisor is 80: 3440 / 80 = 43 and 1440 / 80 = 18. True 21:9 equals 2.333:1, so the common marketing label is about 2.4% narrower than the actual 3440 x 1440 frame.
- Resolution
- 3,440 x 1,440
- Exact ratio
- 43:18
- Total pixels
- 4,953,600
- Greatest common divisor
- 80
What the frame looks like
The frame adds substantial horizontal workspace beside a 16:9 area of the same height. Games can show a wider field of view when supported, while unsupported video commonly leaves bars at the sides.
How it compares
Its exact 43:18 shape is about 2.38% wider than true 21:9. Against 2560 x 1440, it adds 880 horizontal pixels; viewed from the 3440-pixel frame, 2560 x 1440 is 25.58% narrower and contains 25.58% fewer pixels because the height is unchanged.
Devices and formats that use it
- 34-inch ultrawide computer monitors
- PC games with ultrawide support
- Wide editing timelines and multi-window workspaces
- Cinematic game capture and desktop recordings
Same ratio, different resolutions
| Resolution | Total pixels | Ratio |
|---|---|---|
| 1720 x 720 | 1,238,400 | 43:18 |
| 6880 x 2880 | 19,814,400 | 43:18 |
Calculate or change this size
For an exact 43:18 frame, multiply height by 43/18 to find width. Do not use 21/9 when exact 3440 x 1440 proportions are required.
To place an image in this frame, use the image aspect ratio changer. Choose Crop to fill the frame, Fit to preserve the whole image, or Pad to add a background.
Frequently asked questions
Is 3440 x 1440 really 21:9?
Not exactly. It simplifies to 43:18, while 21:9 is a convenient ultrawide marketing label.
How many pixels does it contain?
3440 x 1440 contains 4,953,600 pixels.
Is it wider than 2560 x 1440?
Yes. Both are 1440 pixels high, but 3440 x 1440 adds 880 horizontal pixels.
Will every game fill the screen?
No. Games and video must support ultrawide output or they may crop, stretch, or show side bars.
What size is a 34-inch 3440 x 1440 display in pixels per inch?
The pixel diagonal is about 3,729.5 pixels, which works out to about 109.7 pixels per inch on a 34-inch panel.
Is 3440 x 1440 the same shape as 2560 x 1080?
No. 3440 x 1440 is 43:18, while 2560 x 1080 simplifies to 64:27. Both are marketed as ultrawide 21:9 displays, but neither is exactly 21:9.