TV Resolution Calculator

Find out whether 4K, 1080p, 720p, or 480p is actually worth it for your screen size and viewing distance.

Your Setup

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= {{ distAlt }} {{ distUnit==='m' ? 'ft' : 'm' }}
{{ screenUnit }}
= {{ screenAlt }} {{ screenUnit==='in' ? 'cm' : 'inches' }}

Recommendation

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Resolution zones at your screen size ({{ screenIn }}")
4K
1080p
720p
480p
0 {{ (barMax * 0.25).toFixed(1) }}{{ distUnit }} {{ (barMax * 0.5).toFixed(1) }}{{ distUnit }} {{ (barMax * 0.75).toFixed(1) }}{{ distUnit }} {{ barMax.toFixed(1) }}{{ distUnit }}
4K (Ultra HD) is worth it
within {{ thresh4kDisplay }} {{ distUnit }}
1080p Full HD is worth it
within {{ thresh1080Display }} {{ distUnit }}
720p HD is sufficient
within {{ thresh720Display }} {{ distUnit }}
480p SD is sufficient
beyond {{ thresh720Display }} {{ distUnit }}

Common TV Setups

Viewing Distance Guide

Maximum distance where each resolution is beneficial

TV size 4K max 1080p max 720p max
40"1.5m / 5ft3.1m / 10ft4.8m / 16ft
43"1.7m / 5.5ft3.3m / 11ft5.2m / 17ft
50"1.9m / 6.4ft3.9m / 13ft6.0m / 20ft
55"2.1m / 7ft3.3m / 10.8ft6.6m / 22ft
65"2.5m / 8.3ft3.9m / 12.7ft7.2m / 23.5ft
75"2.9m / 9.6ft4.5m / 14.7ft8.3m / 27ft
85"3.3m / 11ft5.1m / 16.7ft9.4m / 31ft

Based on human visual acuity (~60 arc-seconds per pixel).

Optimal viewing distance vs TV size chart

Source: rtings.com

Does Screen Resolution Actually Matter at Your Distance?

The human eye has a limit to how much detail it can resolve. Beyond a certain distance, a 4K image and a 1080p image are visually identical โ€” so buying a more expensive 4K TV may not be worth it if you sit too far away.

How the Calculation Works

The tool uses the ratio of viewing distance (m) รท screen diagonal (inches) compared against empirically-derived thresholds from human visual acuity studies:

  • Ratio โ‰ค 0.039 โ†’ 4K Ultra HD is perceptibly better than 1080p
  • Ratio โ‰ค 0.060 โ†’ 1080p Full HD is the sweet spot
  • Ratio โ‰ค 0.110 โ†’ 720p HD is sufficient
  • Ratio > 0.110 โ†’ 480p SD โ€” all resolutions look the same

Typical Home Setups

The average living room sofa is 2.5โ€“4m from the TV. For a 55" TV at 3m, the optimal resolution is 1080p โ€” 4K adds no visible benefit. For 4K to matter on a 55" screen, you'd need to sit within about 2.1m.

US vs UK Note

TV size is always measured diagonally in inches. Viewing distance is typically measured in meters in Europe and feet in the US โ€” use the unit toggle above to switch.

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