Size difference
The 45″ ultrawide has 75% more screen area than the 34″ ultrawide 1440p, and is 10.1″ wider and 4.2″ taller. The 34″ ultrawide 1440p measures 31.4″ × 13.1″ (80 × 33 cm) with a 21:9 aspect ratio. The 45″ ultrawide measures 41.5″ × 17.4″ (105 × 44 cm) at 21:9. Panel sizes exclude bezels and stands, so allow about 1–3 cm extra on each side.
Sharpness and pixel density
The 34″ ultrawide 1440p is sharper at 110 PPI versus 83 PPI on the 45″ ultrawide, a 32% increase in pixel density. Individual pixels stop being visible to 20/20 vision beyond about 31″ (80 cm) on the 34″ ultrawide 1440p and 41″ (105 cm) on the 45″ ultrawide.
Workspace
Both show nearly the same number of pixels (5.0 vs 5.0 MP), so at 100% scaling they fit the same amount of content.
On a Mac
The 34″ ultrawide 1440p: sharp, not Retina. It runs at native 3440 × 1440, with a comfortable UI size and clean pixel mapping. Text is sharp, but you may notice individual pixels up close. The 45″ ultrawide: visible pixels. At 83 PPI, text looks noticeably pixelated at normal desk distance, especially next to a MacBook’s Retina screen.
Why this matters: macOS draws its interface at exactly 1× or 2×, so displays near 110 or 220 PPI look best. Read the Mac monitor guide or how we rate sharpness.
Desk and viewing distance
For comfortable viewing, sit roughly 34″ (86 cm) from the 34″ ultrawide 1440p and 45″ (114 cm) from the 45″ ultrawide. A desk at least 96 cm deep keeps the larger screen from feeling too close.
Which should you choose?
34″ ultrawide 1440p
Choose the 34″ ultrawide 1440p if your desk is shallow or narrow, sharp text matters most, or you use a Mac.
45″ ultrawide
Choose the 45″ ultrawide if you want a bigger, more immersive screen.
Shop these sizes
We may earn a commission from qualifying purchases, at no extra cost to you. Learn more.
Frequently asked questions
How much bigger is the 45″ ultrawide than the 34″ ultrawide 1440p?
The 45″ ultrawide has 75% more screen area (721 vs 412 square inches) and is 10.1″ wider.
Which is sharper, the 34″ ultrawide 1440p or the 45″ ultrawide?
The 34″ ultrawide 1440p is sharper at 110 PPI versus 83 PPI on the 45″ ultrawide, a 32% increase in pixel density.
Which is better for a Mac, the 34″ ultrawide 1440p or the 45″ ultrawide?
The 34″ ultrawide 1440p is the better fit (sharp, not Retina). It runs at native 3440 × 1440, with a comfortable UI size and clean pixel mapping. Text is sharp, but you may notice individual pixels up close.
Which is better for gaming, the 34″ ultrawide 1440p or the 45″ ultrawide?
They render nearly the same number of pixels, so the same graphics card performs alike on both. Choose by size, refresh rate and panel type.
Will a 45″ ultrawide fit on my desk?
Its screen is 41.5″ (105 cm) wide; allow about 1″ (2–3 cm) more for the frame. For comfortable viewing, a desk at least 96 cm (38″) deep works best, or use a monitor arm to push it back.
How far should I sit from a 45″ ultrawide?
About 45″ (114 cm) is comfortable, so the full screen height stays within a relaxed field of view.
Last updated October 8, 2026. Figures are calculated from panel diagonal and resolution; bezels and stands vary by model.