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How big is an 18-inch laptop screen? Dimensions of the 16:10 desk-replacement size

By TechCompare · Updated · How we check

An 18-inch 16:10 screen is about 38.8 cm (15.26 inches)15.26 inches (38.8 cm) wide and 24.2 cm (9.54 inches)9.54 inches (24.2 cm) tall. Those figures don't include the bezel or the stand, so the whole laptop is bigger.

The 18" 16:10 laptop panel next to a 16" 16:10 reference

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

18" 16:10 laptop: 38.8 cm (15.3 in)15.3 in (38.8 cm) × 24.2 cm (9.5 in)9.5 in (24.2 cm) · 939 cm² (146 in²)146 in² (939 cm²)
16" 16:10: 34.5 cm (13.6 in)13.6 in (34.5 cm) × 21.5 cm (8.5 in)8.5 in (21.5 cm) · 742 cm² (115 in²)115 in² (742 cm²)
Width difference: 4.3 cm (1.7 in)1.7 in (4.3 cm) (11.1%) · Height difference: 2.7 cm (1.1 in)1.1 in (2.7 cm) (11.1%) · Area ratio: 0.79×
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 18″ vs 16″ overlay, pre-loaded. Swap the reference, change either panel, or flip units.
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An 18-inch 16:10 laptop screen measures 38.8 cm (15.26 inches)15.26 inches (38.8 cm) wide by 24.2 cm (9.54 inches)9.54 inches (24.2 cm) tall, giving you about 939 cm² (146 square inches)146 square inches (939 cm²) of display area. That's a step past the 17.3-inch class. Review roundups of 18-inch laptops are mostly gaming machines, with some workstations and very few non-gaming designs.

Dimensions
38.8 cm × 24.2 cm15.3" × 9.5"
15.3" × 9.5"38.8 cm × 24.2 cm
Screen area
146 sq in
939 cm²
Aspect ratio
16:10
45.7 cm (18") diagonal18" (45.7 cm) diagonal

How this is calculated

In metric, 38.8 cm wide by 24.2 cm tall, roughly 939 cm². Resolution decides how sharp a panel this size looks. A 1920×1200 panel holds 2.30 million pixels across that area, and a 3840×2400 panel holds 9.22 million.

Verdict

Pick 18 inches only when the laptop lives on a desk and you want one large panel in place of an external monitor. The panel measures 38.8 cm (15.26 in)15.26 in (38.8 cm) wide by 24.2 cm (9.54 in)9.54 in (24.2 cm) tall for about 939 cm² (146 in²)146 in² (939 cm²) of area.

If you carry it at all, plan for a large bag. The trade is size: you get a big screen, and you carry the chassis that comes with it.

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.
View details
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

17.3" 16:9 laptop screen size
The 17.3-inch gaming class, one step below this diagonal.
View guide
16" 16:10 laptop screen size
The desktop-replacement size one step down in diagonal.
View guide
16:10 laptop ratio explained
Why 16:10 gives a laptop more height at the same width.
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 an 18-inch 16:10 laptop screen in inches and cm?
It measures 38.8 cm (15.26 inches)15.26 inches (38.8 cm) wide and 24.2 cm (9.54 inches)9.54 inches (24.2 cm) tall, with about 939 cm² (146 square inches)146 square inches (939 cm²) of area. Those are the screen figures only.
Is an 18-inch laptop too big to carry?
Probably, for daily travel. Reviewers advise these laptops mainly for desk use, and a chassis this size needs a large bag. If the laptop has to move between rooms every day, a 16-inch or smaller model is the easier choice.
Is 18 inches much bigger than 16 inches?
Yes. The 18-inch panel has about 27% more area than a 16-inch 16:10 panel. Each side is 12.5% larger, so the extra area comes from width and height together.
What PPI does an 18-inch screen get at higher resolutions?
At 2560×1600 it's 168 PPI, and at 3840×2400 it's 252 PPI. Pixel count alone doesn't tell you how crisp the text looks, since viewing distance and scaling matter too.

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