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Как да изчислим Screen Size Calculator

Какво е Screen Size Calculator?

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.

Ръководство стъпка по стъпка

  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

Worked Examples

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

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