Two 27-inch monitors side by side need about 125 cm of desk width. Three 24-inch panels need 165 cm flat, or closer to 145 cm if you angle the outer screens inward. The exact number depends on your layout, the monitors you pick, and whether you keep them flat or turn them in toward you.
Below are five common multi-monitor layouts with measured widths for each. If you want to test a configuration on your desk before buying, the desk setup planner lets you drop monitors onto a scaled desk and see exactly what fits.
Side-by-Side Dual Monitors
The simplest layout. Two monitors flat on the desk, edges nearly touching. Total width is the sum of both panels plus a small gap.
The Dell U2723QE, one of the most popular 27-inch productivity monitors, is 61.13 cm wide. Two of them measure 122.26 cm. Add a 3-5 cm gap for angle adjustment and cable routing, and you land at 125-127 cm.
That fits on a 140 cm IKEA LAGKAPTEN with about 7 cm of clearance per side. On a 120 cm desk, the same pair leaves under 1 cm per side. Technically possible, but no room for speakers or a desk lamp.
Bezel thickness matters here. Dell and LG thin-bezel monitors have 6-7 mm bezels per side, so the visible seam between two panels is about 13 mm. Some ASUS TUF and BenQ models run 9-12 mm, pushing the seam past 20 mm. Check the desk size guide for clearance calculations on specific desk widths.
Angled Dual Monitors
Angling each monitor 15 degrees inward reduces the projected width by about 8-10 cm for the pair. Those same two Dell U2723QE monitors go from 127 cm flat to roughly 117-119 cm angled. That is the difference between fitting and not fitting on a 120 cm desk.
The tradeoff is depth. Angled monitors push the outer edges forward, needing about 5-8 cm more than a flat layout. A 60 cm desk handles this fine. The ergonomic payoff is worth it too: OSHA workstation guidelines recommend angling screens toward you whenever the combined display width exceeds your natural field of view.
If one monitor is your primary, center it directly ahead and angle only the secondary at 25-30 degrees. This needs less total width than equal angling because only one panel is turned.
Stacked (One Above the Other)
A stacked layout uses the same horizontal footprint as a single monitor. If your desk fits one 27-inch screen, it fits two stacked. Width is not the problem. Height is.
You need a tall-pole monitor arm. The Ergotron LX Tall Pole (70) is the standard choice for stacking two 27-inch panels. Regular arms do not have enough vertical travel. The top monitor should tilt downward 15-20 degrees so you can read it without craning your neck.
