How Wide Should a TV Stand Be? The Diagonal-to-Width Math

TV sizes are diagonals; TV stands are widths. The conversion, the eye-level height rule, and the clearances (soundbar, fireplace, cords) that decide whether a media wall actually works.

TVs are measured corner to corner — stands aren't

A "65-inch TV" is 65 inches on the diagonal. Its actual width is about diagonal × 0.87: a 65″ TV is roughly 57″ wide; a 75″ TV about 65″. That's the number to compare against a stand's width.

The proportion rule: the stand should be wider than the TV, ideally by 3–6 inches per side. A TV that overhangs its stand looks precarious because it is — and it usually violates the manufacturer's foot-spacing spec too. Quick targets:

55″ TV (~48″ wide) → stand 55–65″ wide
65″ TV (~57″ wide) → stand 62–72″; browse 61-to-70-inch stands
75″ TV (~65″ wide) → stand 71–85″; browse 71-to-80-inch stands

Where the retailer states a rated TV size ("fits TVs up to 70″"), Alcovio captures it as its own filterable number — but the width math above works on every stand, rated or not.

Height: the eye-level rule

Seated eye level is about 40–44 inches off the floor, and the center of the screen should land there. Work backwards: for a 65″ TV (~32″ tall), center-at-42″ puts the TV's bottom edge at 26″ — so a 15–25″ tall stand is right for most setups. Taller stands push big screens above comfortable eye level; that's why modern consoles run low. If the numbers fight, favor lower: looking slightly down beats craning up.

The clearances everyone forgets

Soundbar: add 3–5 inches between the TV's bottom edge and the stand top, or check for a dedicated soundbar shelf.
Depth: consoles run 15–20 inches deep; TVs on feet need most of it. Add cord space — a stand jammed flush to the wall pinches HDMI bends.
Fireplace consoles: electric-fireplace stands (a big slice of the category — see fireplace TV stands) need a few inches of front clearance for the heater and put warm air below the screen; check the insert's clearance spec against your TV's bottom edge.
Doors and drawers: stands with storage need swing room in front — count it as part of the walkway.

Every stand on Alcovio lists true width, depth, and height, so once you've converted your TV's diagonal, the width filter does the rest.