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Find the physical width, height and area of any monitor from its diagonal and aspect ratio.
Common sizes:
Screen size
Width
Height
Area
≈ A-list of
common class size
Choose the format of your monitor: 16:9, 21:9 ultrawide, 32:9 super ultrawide or another ratio.
Type the diagonal size in inches, for example 27 or 34.
See the physical width and height in inches and centimeters, plus the screen area.
The diagonal alone does not tell you how big a monitor is — a 34-inch ultrawide is much shorter than a 34-inch 16:9 monitor. Width, height and area determine whether it fits your desk, your mounting arm and how immersive it feels.
Knowing exact dimensions (and weight) lets you plan desk space, VESA mount clearance and dual-monitor setups with confidence. This calculator gives you width, height and area in both inches and centimeters.
A 27-inch 16:9 monitor is about 23.5 inches (59.8 cm) wide and 13.2 inches (33.6 cm) tall. This calculator gives the exact numbers for any diagonal and ratio.
A 34-inch 21:9 ultrawide is roughly 31.1 inches (79 cm) wide and 13.1 inches (33.2 cm) tall — the same height as a 27-inch monitor but much wider.
The diagonal is the distance between opposite corners of the screen, usually measured in inches. It relates to width and height via the aspect ratio.
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