Screen Size Calculator

The Screen Size Calculator helps you determine the physical dimensions of a display or its diagonal measurement based on resolution and pixel density.

Required Inputs & Typical Use Cases

• Pixel Width

  Horizontal pixel resolution of the display (e.g., 1920).

• Pixel Height

  Vertical pixel resolution of the display (e.g., 1080).

• Pixel Per Inch (PPI)

  The density of pixels per inch, often provided in device specifications.

Common scenarios: (1) Convert laptop or monitor specifications into actual physical dimensions; (2) Compare two displays with different resolutions and PPI values; (3) Determine the area of a screen for design layouts; (4) Understand how mobile screens translate to physical size.

The Formula

Width = pixels₁ / PPI
Height = pixels₂ / PPI
Diagonal = √(Width² + Height²)
Area = Width × Height

• PPI

  Pixels per inch

• Width

  Screen width in inches

• Height

  Screen height in inches

• Diagonal

  Diagonal length in inches

Worked Example

1. Example

   Resolution: 2880 × 1800, PPI: 220 Width = 2880 / 220 ≈ 13.1 in Height = 1800 / 220 ≈ 8.2 in Diagonal = √(13.1² + 8.2²) ≈ 15.5 in Area ≈ 107.4 sq in

Tips, Assumptions & Limitations

• Ensure the PPI value is accurate to avoid misleading measurements.
• Use manufacturer specifications when available for the most precise calculations.
• This tool assumes square pixels and does not include bezels or casing.