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Screen Size calculator
Screen Size calculator
Enter your values below and press Calculate to see your result instantly.
Pixel Density (PPI)
108.8 PPI
ASPECT RATIO
16:9
TOTAL SURFACE
311 in²
27"
At 27", a 1440p resolution provides 108.8 pixels per inch. This is considered "Retina" at 32 inches of viewing distance.
About the Screen Size calculator
Find the real width and height of a screen from its diagonal size and resolution, along with its aspect ratio and pixel density.
How to use the Screen Size calculator
- Enter the Diagonal Size (Inches).
- Enter the Resolution Width (px) and Height (px).
- Press Calculate.
Formula and method
Width = Diagonal × w ÷ √(w² + h²) and Height = Diagonal × h ÷ √(w² + h²).
Worked example
A 27-inch 1920 × 1080 (16:9) display is about 23.5 in wide and 13.2 in tall.
Tips
- Screen sizes are measured on the diagonal, so two screens with the same diagonal can have different widths.
- Check the physical size before buying a monitor or TV for your space.
Frequently Asked Questions
The ratio of width to height, for example 16:9 for most TVs and monitors.