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How big is a 38-inch ultrawide monitor? Dimensions for a 3840:1600 panel

By TechCompare · Updated · How we check

A 38-inch 3840:1600 ultrawide screen is about 89.1 cm (35.08 inches)35.08 inches (89.1 cm) wide and 37.1 cm (14.62 inches)14.62 inches (37.1 cm) tall. Those numbers assume the full 38 inches on the diagonal.

The 38" ultrawide monitor panel next to a 34" 21:9 reference

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

38" ultrawide monitor: 89.1 cm (35.1 in)35.1 in (89.1 cm) × 37.1 cm (14.6 in)14.6 in (37.1 cm) · 3307 cm² (513 in²)513 in² (3307 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: 9.7 cm (3.8 in)3.8 in (9.7 cm) (10.9%) · Height difference: 3.1 cm (1.2 in)1.2 in (3.1 cm) (8.4%) · Area ratio: 0.82×
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 38″ vs 34″ overlay, pre-loaded. Swap the reference, change either panel, or flip units.
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A 38-inch ultrawide with a 3840 by 1600 panel measures 89.1 cm (35.08 inches)35.08 inches (89.1 cm) wide by 37.1 cm (14.62 inches)14.62 inches (37.1 cm) tall, giving you about 3307 cm² (513 square inches)513 square inches (3307 cm²) of screen area. LG's UK spec page lists this shape as 21:9, but the real panel is a little wider than that. The numbers below use the real pixel shape.

Dimensions
89.1 cm × 37.1 cm35.1" × 14.6"
35.1" × 14.6"89.1 cm × 37.1 cm
Screen area
513 sq in
3307 cm²
Aspect ratio
2.40:1
96.5 cm (38") diagonal38" (96.5 cm) diagonal

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How this is calculated

The panel works out to 2.40 units wide for every unit tall, while true 21:9 is 2.33. The pixel count reduces to 12:5, which is a small gap. At 38 inches, the real panel is 0.4 cm (0.1 inches)0.1 inches (0.4 cm) wider than a 21:9 screen, and a 21:9 screen of the same diagonal would be 0.9 cm (0.4 inches)0.4 inches (0.9 cm) taller.

LG's spec table for its 38WN95C-W lists the panel at 37.5 inches (95.29 cm), while its headline says 38. This page uses the nominal 38-inch figure as its input.

Verdict

Pick 38 inches when a 34-inch feels short on height and a 49-inch is more screen than the desk can hold. The panel measures 89.1 cm (35.08 in)35.08 in (89.1 cm) wide by 37.1 cm (14.62 in)14.62 in (37.1 cm) tall for about 3307 cm² (513 in²)513 in² (3307 cm²) of area.

That's 22% more area than a 34-inch ultrawide. It's also 3.1 cm (1.2 inches)1.2 inches (3.1 cm) taller.

Pixel density stays close to the 34-inch: 109 PPI here, against 110 PPI on the 34-inch. The trade is desk space. At 35 inches wide, the panel needs at least a 100 cm (40-inch) desk and room for the stand base.

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.
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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.
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Related guides

34" 21:9 ultrawide screen size
The 34-inch 21:9 ultrawide, the size down from this one.
View guide
45" ultrawide screen size
The 45-inch 3440 by 1440 ultrawide, the next size up.
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 standard 34-inch ultrawide 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 38-inch 3840:1600 monitor?
The screen is 89.1 cm (35.08 inches)35.08 inches (89.1 cm) wide and 37.1 cm (14.62 inches)14.62 inches (37.1 cm) tall, with about 3307 cm² (513 square inches)513 square inches (3307 cm²) of area. These figures use the nominal 38-inch diagonal, not the 37.5 inches in LG's spec table.
Is a 38-inch ultrawide the same as a 21:9 monitor?
Close, but not exact. The real shape is 2.40 to 1, against 2.33 for true 21:9, so the difference at this diagonal is 0.4 cm (0.1 inches)0.1 inches (0.4 cm) in width.
What PPI does 3840 by 1600 give at 38 inches?
About 109 PPI. That's close to the 110 PPI of a 34-inch 3440 by 1440 panel, so text sharpness is similar.
What desk width does a 38-inch ultrawide need?
Plan on at least 100 cm (40 inches) of clear width. The panel alone is 35 inches wide, and the stand base needs its own space under the middle of the screen.

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