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How big is a 45-inch ultrawide monitor? Dimensions for a 3440:1440 panel

By TechCompare · Updated · How we check

A 45-inch 3440:1440 ultrawide screen is about 105.4 cm (41.51 inches)41.51 inches (105.4 cm) wide and 44.1 cm (17.38 inches)17.38 inches (44.1 cm) tall. Only the nominal 45-inch diagonal is used here.

The 45" ultrawide monitor panel next to a 34" 21:9 reference

Drawn to scale so you can see the size difference at a glance

45" ultrawide monitor: 105.4 cm (41.5 in)41.5 in (105.4 cm) × 44.1 cm (17.4 in)17.4 in (44.1 cm) · 4653 cm² (721 in²)721 in² (4653 cm²)
34" 21:9: 79.4 cm (31.3 in)31.3 in (79.4 cm) × 34.0 cm (13.4 in)13.4 in (34.0 cm) · 2700 cm² (419 in²)419 in² (2700 cm²)
Width difference: 26.1 cm (10.3 in)10.3 in (26.1 cm) (24.7%) · Height difference: 10.1 cm (4.0 in)4.0 in (10.1 cm) (22.9%) · Area ratio: 0.58×
Both panels share a corner and are drawn at the same scale, so the extra width and height of the larger screen are true to size. Open these two in the full Screen Size Comparison ›
This exact 45″ vs 34″ overlay, pre-loaded. Swap the reference, change either panel, or flip units.
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A 45-inch ultrawide with a 3440 by 1440 panel measures 105.4 cm (41.51 inches)41.51 inches (105.4 cm) wide by 44.1 cm (17.38 inches)17.38 inches (44.1 cm) tall, giving you about 4653 cm² (721 square inches)721 square inches (4653 cm²) of screen area. LG's 45-inch spec page lists this panel as 21:9, but 3440 by 1440 is a bit wider than true 21:9. Every figure here uses 3440:1440 as the shape.

Dimensions
105.4 cm × 44.1 cm41.5" × 17.4"
41.5" × 17.4"105.4 cm × 44.1 cm
Screen area
721 sq in
4653 cm²
Aspect ratio
2.39:1
114.3 cm (45") diagonal45" (114.3 cm) diagonal

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How this is calculated

The panel's shape is 2.39 wide for each unit tall, and true 21:9 is 2.33. At 45 inches, that gap is 0.4 cm (0.1 inches)0.1 inches (0.4 cm) of extra width.

LG lists its 45GR95QE-B at 44.5 inches (113 cm) in the spec table, while the product name says 45. This page uses the nominal 45-inch figure as its input.

Verdict

Pick 45 inches when you want the 34-inch pixel count on more glass without going to a 49-inch. The panel measures 105.4 cm (41.51 in)41.51 in (105.4 cm) wide by 44.1 cm (17.38 in)17.38 in (44.1 cm) tall for about 4653 cm² (721 in²)721 in² (4653 cm²) of area.

That's 72% more area than a 34-inch. The extra height over the 34-inch is 10.1 cm (4 inches)4 inches (10.1 cm).

The same 3440 by 1440 pixels spread across more glass: 83 PPI here, against 110 on the 34-inch. Single pixels show closer than 105 cm (41 inches)41 inches (105 cm).

The panel alone is 42 inches wide, so a desk about 120 cm (48 inches) wide leaves a margin at each side. A 45-inch screen is also 17 inches tall, and a deep desk lets you sit back far enough to see the corners without turning your head.

More Screen Size scenarios

24" 16:9 monitor
The classic desktop size: big enough for a browser plus sidebar, and it fits on any desk.
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27" 16:9 monitor
A 27-inch 16:9 monitor measures 23.53 inches (59.8 cm) wide by 13.24 inches (33.6 cm) tall, giving you about 312 square inches (2010 cm²) of screen area, excluding the bezel.
View details
32" 16:9 monitor
A 32-inch 16:9 monitor measures 27.89 inches (70.8 cm) wide by 15.69 inches (39.8 cm) tall, giving you about 438 square inches (2823 cm²) of screen area.
View details

Related guides

34" 21:9 ultrawide screen size
The 34-inch ultrawide with the same 3440 by 1440 pixel count.
View guide
49" 32:9 super ultrawide screen size
The 49-inch 32:9 panel, a super ultrawide option.
View guide
34" ultrawide (3440×1440) PPI
PPI of the 34-inch panel at the same resolution.
View guide
49" super ultrawide (5120×1440) PPI
Pixel density of the 49-inch 5120 by 1440 panel.
View guide
Screen size chart
Width, height and area of common screen sizes, in inches and cm.
View guide

Frequently asked questions

What are the exact dimensions of a 45-inch 3440 by 1440 screen?
The screen is 105.4 cm (41.51 inches)41.51 inches (105.4 cm) wide and 44.1 cm (17.38 inches)17.38 inches (44.1 cm) tall, with about 4653 cm² (721 square inches)721 square inches (4653 cm²) of screen area. The frame and stand sit outside those figures.
Is a 45-inch ultrawide the same as a 49-inch super ultrawide?
No. A 45-inch screen is the taller of the two. A 49-inch is the wider one. The 45 runs 83 PPI, and the 49 runs 109 PPI.
What desk width do I need for a 45-inch ultrawide?
Plan on about 120 cm (48 inches) of clear width, with room under the middle for the stand base.
Can a 45-inch ultrawide replace two 27-inch monitors?
Two 27-inch 16:9 panels side by side span 47 inches. The 45 is narrower than that pair, but it gives you one unbroken canvas with no bezel gap. Whether it replaces them depends on how much you need the extra screen area.

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