Short answer: the 45-inch 32:9 ultrawide is not just a larger 34-inch monitor. It is a much wider, shorter-feeling workspace built for side-by-side zones, while the 34-inch 21:9 class keeps the familiar ultrawide shape and usually fits more desks.
This comparison matters because both options can be called ultrawide, but they solve different problems. A 34-inch 3440 x 1440 monitor is a broad main display. A 45-inch 32:9 monitor behaves more like two displays merged into one panel.
The 34-inch ultrawide is 31.25" (79.4 cm) wide and 13.39" (34 cm) tall, while the 45-inch super ultrawide is 43.32" (110 cm) wide and 12.18" (30.9 cm) tall. That makes the 45-inch super ultrawide the larger screen by 26.1% of usable area.
The 34-inch ultrawide measures 31.25" (79.4 cm) wide by 13.39" (34 cm) tall, with a total screen area of 418.6 square inches. The 45-inch super ultrawide measures 43.32" (110 cm) wide by 12.18" (30.9 cm) tall, covering 527.8 square inches.
The practical difference: the 45-inch super ultrawide is 38.6% wider, the 34-inch ultrawide is 9% taller, and 45-inch super ultrawide offers 26.1% more screen area. Width affects how much desk space you need, while the height delta shows how much vertical space changes for documents, timelines, and video.
The practical choice depends on what feels limiting in your current setup. For coding, timelines, spreadsheets, and games, the wider option gives more room for side-by-side windows, while the taller option keeps more vertical content visible without pushing the edges of the screen as far away. If your desk is shallow, width and viewing distance matter as much as raw diagonal size.
34-inch 21:9 vs 45-inch 32:9 is mostly about side-by-side workspace. A 21:9 display behaves like one wide main workspace, while a 32:9 super ultrawide is closer to two monitors fused into one panel. The physical width number matters more than the diagonal when you are checking speakers, arms, laptop stands, or portrait side screens.
At 3440x1440, the 34-inch ultrawide achieves 110 PPI. The 45-inch super ultrawide at 5120x1440 reaches 118 PPI. The 45-inch super ultrawide has 7.8% higher pixel density, resulting in sharper text and images.
For text-heavy work, PPI is the number that decides whether you are buying more room or just making everything bigger. A lower-PPI large screen can feel spacious for windows but softer for code and documents. A higher-PPI screen may need OS scaling, but it usually gives cleaner text and more flexible sizing.
For 16:9 content (most videos and games), the 34-inch ultrawide provides an effective diagonal of 27.3", while the 45-inch super ultrawide provides 24.9". Check this if you watch 16:9 video or play games that do not support ultrawide resolutions.
Choose based on your window layout. If you want one main app with a browser or docs beside it, 34 inches is enough for many setups. If you want three or more persistent zones without side monitors, the 45-inch 32:9 format starts to make sense.
Frequently Asked Questions
- Is a 45-inch 32:9 ultrawide taller than a 34-inch ultrawide?
- Not by as much as the diagonal implies. The 45-inch 32:9 shape spends much of its diagonal on width, so compare screen height and PPI before assuming it feels bigger in every direction.
- Who should choose a 45-inch 32:9 ultrawide over a 34-inch ultrawide?
- Choose the 45-inch 32:9 option if you want a single-panel replacement for multiple side-by-side windows. Choose the 34-inch option if you want a simpler main monitor with easier desk fit.
- What are the exact dimensions of a 34-inch ultrawide?
- A 34-inch ultrawide measures 31.25" (79.4 cm) wide by 13.39" (34 cm) tall, with a screen area of 418.6 square inches.
- What are the exact dimensions of a 45-inch super ultrawide?
- A 45-inch super ultrawide measures 43.32" (110 cm) wide by 12.18" (30.9 cm) tall, with a screen area of 527.8 square inches.
- Which is bigger: 34-inch ultrawide or 45-inch super ultrawide?
- The 45-inch super ultrawide is 26.1% larger in total screen area, though the 34-inch ultrawide may be taller depending on aspect ratio.
- How much desk space do I need for a 45-inch super ultrawide?
- A 45-inch super ultrawide requires at least 43.32" of desk width. We recommend 49.32" to allow comfortable margins on each side.
- How wide is 34-inch ultrawide compared with 45-inch super ultrawide?
- The 34-inch ultrawide is 31.25" wide. The 45-inch super ultrawide is 43.32" wide, so the width change is 12.07" before bezels, arms, or speaker space.
- Which has better pixel density: 34-inch ultrawide or 45-inch super ultrawide?
- The 45-inch super ultrawide at 5120x1440 has 118 PPI, which is 7.8% higher than the 34-inch ultrawide's 110 PPI.
- How does 16:9 content look on these displays?
- On the 34-inch ultrawide, 16:9 content appears at an effective 27.3" diagonal. On the 45-inch super ultrawide, it appears at 24.9". Ultrawides display 16:9 content with black bars on the sides.