Two 27-inch monitors plus a vertical 27-inch sidecar - desk fit guide

How this is calculated

This is the developer power-user layout. The two landscape 27-inch panels handle the main workspace and code editor, while the portrait 27-inch sidecar carries chat, terminals, or long documents. The portrait 27-inch stands about 23.5 inches (60 cm) tall, which lines up cleanly with the landscape panels at the same base level because the 1440p portrait 27-inch gives 2560 lines of vertical resolution, enough for roughly 100-120 lines of code at a standard font size.

Verdict

The 47-inch (119 cm) dual landscape footprint plus the 13-inch (33 cm) portrait sidecar comes to about 60 inches (152 cm), which is the width that makes a 63-inch (160 cm) desk the natural floor and leaves about 1.5 inches (3.8 cm) of clearance per side before angling. Tilting all three panels inward compresses the footprint to about 55 inches (140 cm) and opens roughly 4 inches (10 cm) per side, which is the move that keeps the sidecar from sitting flush against the desk edge. The 31.5-inch (80 cm) depth does most of the comfort work: the three native stands consume roughly 24 inches (61 cm) of depth in total but the keyboard surface still gets about 22 inches (56 cm), and the resulting 27-28 inch (69-71 cm) viewing distance lands where 1440p 27-inch panels are sharp. A VESA 100x100 triple arm reclaims the stand depth and is the practical move here because three native stands on a single surface eat a lot of desk real estate and the cable clutter is real.