70 vs 80 Inch TV: Size Comparison to Scale
A 80-inch TV has 31% more screen area than a 70-inch one. Side by side, that's 22.1 cm more width and 12.5 cm more height. The picture below shows both screens in true relative scale.
Both screens drawn to the same scale, aligned at the bottom-left corner.
| Parameter | 70″ cm | 70″ in | 80″ cm | 80″ in | Δ |
|---|---|---|---|---|---|
| Width | 155.0 cm | 61.0 in | 177.1 cm | 69.7 in | +14% |
| Height | 87.2 cm | 34.3 in | 99.6 cm | 39.2 in | +14% |
| Area | 13508 cm² | 2094 in² | 17643 cm² | 2735 in² | +31% |
The difference in numbers
The 80″ screen is 22.1 cm wider (+14%) and 12.5 cm taller (+14%) than the 70″ screen. The 80″ screen is 31% larger by area.
Recommended viewing distance
70″: 2.13 m – 2.89 m (7.0 ft – 9.5 ft)
80″: 2.43 m – 3.30 m (8.0 ft – 10.8 ft)
Questions about 70″ vs 80″
Is 80″ worth it over 70″?
Yes if you want noticeably more picture: the 80″ has 31% more screen area than the 70″. Whether it's worth it comes down to budget and how far you sit.
Will the picture quality change?
Picture quality depends on resolution and panel, not size — a larger screen just spreads the same pixel count over more area, so pixel density drops unless you also step up in resolution.
Do these sizes include the bezel?
No — both figures are for the visible screen only; real cabinets run a few centimetres larger on each side depending on the model.