16:9 standard
- Width
- 39.22 in (99.6 cm)
- Height
- 22.06 in (56 cm)
- Diagonal
- 45 in (114.3 cm)
- Area
- 865.3 sq in (5582 cm²)
45-inch (114.3 cm) monitor dimensions
A 45-inch display changes shape depending on aspect ratio. Use these measured dimensions to estimate desk fit, screen area, and adjacent-size or ultrawide alternatives.
A 45-inch 16:9 monitor is about 39.2 inches wide and 22.1 inches tall, before bezels or the stand. To fill a relaxed 30-degree view, sit about 73 inches (185 cm) away; about 54 inches (137 cm) fills an immersive 40 degrees. For a 45-inch monitor, aspect ratio matters more than the diagonal: 21:9 OLED, 5K2K, and 32:9 panels have very different width, height, and desk-depth needs.
Compare nearby screens or open the calculator.
Measured by shape
21:9 ultrawide
- Width
- 41.36 in (105.1 cm)
- Height
- 17.73 in (45 cm)
- Diagonal
- 45 in (114.3 cm)
- Area
- 733.2 sq in (4730 cm²)
32:9 super ultrawide
- Width
- 43.32 in (110 cm)
- Height
- 12.18 in (30.9 cm)
- Diagonal
- 45 in (114.3 cm)
- Area
- 527.8 sq in (3405 cm²)
Fit read
Best use
Large ultrawide option
Useful when 34 inches feels too small but 49 inches feels too wide or too specialized.
Desk depth
Check viewing distance
A 45-inch monitor can fit by width but still feel too close on shallow desks.
Resolution check
UWQHD vs 5K2K
A 45-inch 3440x1440 panel prioritizes size and immersion; 5K2K adds sharper text and more room for windows.
45 inch monitor dimensions and desk depth
Short answer
45-inch monitors now cover several distinct formats
A 45-inch monitor can mean a large 21:9 OLED ultrawide, a newer 5K2K work/gaming panel, or a 32:9 super-ultrawide. The diagonal is not enough: compare it against 40-inch 5K2K, 38-inch ultrawide, 34-inch ultrawide, and 49-inch super ultrawide.
From normal desktop
32-inch monitor vs 45-inch ultrawide monitor
The page to check before replacing a normal 32-inch display with a much wider super-ultrawide.
Resolution check
3440 x 1440 vs 5120 x 2160
45-inch OLED panels can feel very different depending on whether they are UWQHD or 5K2K.
Desk fit
45-inch setup plans
Browse side-monitor, ultrawide, super-ultrawide, and dashboard layouts built around the 45-inch class.
45-inch product examples
44.5" · UWQHD OLED
LG UltraGear OLED 45GS95QE-B
40.9 x 17.5 in screen, about 84 PPI.
44.5" · UWQHD OLED
LG UltraGear OLED 45GX900A-B
40.9 x 17.5 in screen, about 84 PPI.
45" · UWQHD OLED
Corsair XENEON FLEX 45WQHD240
41.4 x 17.7 in screen, about 83 PPI.
Image: LG Electronics Nordic45" · 5K2K OLED
LG UltraGear OLED 45GX950A
41.5 x 17.5 in screen, about 123 PPI.
Shop this size
Paid linksWhere to buy 45-inch monitors
Catalog models with retailer links- Image: LG Electronics Nordic
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