TV Size Calculator
Measure or estimate your sofa-to-screen distance and pick the content resolution you actually watch. The calculator gives the right diagonal in inches, the real width in centimetres for stands and walls, and the too-close limit for that size.
Retail size guides nudge you up a bracket because bigger sells. The honest rule - distance divided by 1.5 for 4K, 2.2 for 1080p - lands where pixels disappear and the picture fills your view, not the shop floor.
How to use
- Measure from the screen to where you actually sit - the farthest seat if the family spreads out.
- Pick the resolution you mostly watch: streams and discs in 4K, older broadcast at 1080p.
- Check the width figure against your stand or wall section, and mind the TV's own feet - they are often wider than expected.
Frequently asked questions
How big a TV for 2.5 metres?
About 65 inches for 4K content (2.5 m ÷ 1.5 ÷ 2.54 ≈ 65). The same seat with 1080p broadcast suits roughly 45 inches - closer to the bigger figure and compression artefacts start showing.
Is a TV ever too big for the room?
Functionally yes: past the too-close limit you resolve pixels and scan lines and eyes tire faster. Cosmetically, a screen that dominates the wall is a taste question - the calculator gives the functional ceiling, decoration is yours.
Does 4K really matter at sofa distance?
Yes, increasingly so: 4K packs pixels fine enough that you can sit much closer for the same image quality, which is why the 4K divisor is smaller. At 1080p the same closeness resolves the grid - 4K lets big screens work in smaller rooms.
How much space do I need for a 65-inch TV?
The panel alone is about 145 × 84 cm; add 10-20 cm if it stands on feet, more for a soundbar. Measure the wall section or console before buying - doorways on delivery day are the other classic discovery.