วิธีการคำนวณ Screen Size Calculator

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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.

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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

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