Put the centre of the screen 100-110 cm above the floor for a sofa with a 42-45 cm seat. The maths: seated eye level is about 60-65 cm above the seat, so eyes land at 102-110 cm — and the screen centre should sit level with the eyes, or up to 15 cm above them. For a 55-inch TV (68 cm tall), that means the bottom edge at 66-76 cm and the top at 134-144 cm.
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Height by sofa
| Sofa seat height | Seated eye level | Screen centre | 55" TV bottom edge |
|---|---|---|---|
| 38 cm (low modular) | 98-103 cm | 100-105 cm | 66-71 cm |
| 42 cm (standard) | 102-107 cm | 104-109 cm | 70-75 cm |
| 45 cm (high-back) | 105-110 cm | 107-112 cm | 73-78 cm |
| Bar stool / kitchen counter | 125-130 cm | 125-135 cm | 91-101 cm |
Add 5-10 cm if you recline habitually, subtract 5 cm if you sit upright to work. Do not guess from photos — sitting on the actual sofa with a tape measure at eye level takes 30 seconds and settles the number.
Why above the fireplace fails
A typical mantel is 120-135 cm high, which puts a mounted screen centre at 155-175 cm — 50-70 cm above eye level. The result is a 15-20° upward gaze, and neck strain starts at about 15° for a two-hour film. It also doubles the viewing distance you need for comfort, so the sofa gets pushed back and the room loses its layout.
If the fireplace is the only wall, mount above it but accept two compromises: keep the screen as low as the mantel allows (bottom edge 5-10 cm above it), and limit the tilt to 10-15° — beyond 15° the image distorts and the mount puts leverage on the wall.
Distance, height and the media unit
Viewing distance for 4K is 1.2-1.5× the screen diagonal: a 55-inch set wants 1.7-2.1 m, a 65-inch 2.0-2.5 m. Height and distance are linked — the further back you sit, the more a high screen hurts.
The media unit underneath sets the floor line and hides cables. A 106 cm wide unit suits TVs up to 50 inches; for 55-65 inches look for 140-180 cm. Keep the unit top at 45-55 cm, which leaves a 15-25 cm gap under the screen bottom at the heights above — enough for a soundbar and no visual crowding.
Mounting practicalities
- Wall type: a 55-inch TV is 13-18 kg; a tilting bracket adds 4-6 kg. Plasterboard needs two studs or four 25 kg anchors.
- Cable height: run the conduit before mounting. A 50 mm duct behind the wall handles two HDMI and one power lead.
- Socket height: 40-45 cm above the floor keeps plugs hidden behind the media unit.
- Eye-level check: sit down, close one eye, and have someone hold a phone at the proposed centre. If you look up to see it, it is too high.
The TV stand size guide covers unit width against screen size, and the wall anchor guide has the fixing types for cavity walls.
Keep reading
More dimension guides are in the collection, and the full index is on the furnolio journal.
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