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A screen size calculator computes a monitor's or TV's actual width, height, and pixel density (PPI) from the diagonal measurement and aspect ratio. It helps compare displays of different sizes and resolutions.

Przewodnik krok po kroku

  1. 1Use Pythagoras' theorem with the aspect ratio to derive width and height from diagonal
  2. 2For 16:9 aspect ratio: height = diagonal × 9 / √(16²+9²); width = height × 16/9
  3. 3PPI = √(horizontal pixels² + vertical pixels²) / diagonal inches

Rozwiązane przykłady

Wejście
27-inch 16:9 monitor · 2560×1440 resolution
Wynik
23.5" × 13.2" · 109 PPI
QHD resolution at common desk size
Wejście
55-inch TV · 3840×2160 (4K)
Wynik
47.9" × 27" · 80 PPI
Typical living room 4K TV

Ustawienia