Display Size Calculator

Introduction: The Display Size Calculator is a useful tool for individuals and professionals working with displays. Knowing the actual size of your screen is essential for design, multimedia, and user experience considerations. This calculator simplifies the process by providing the display size based on the resolution (width and height) and the diagonal size of the screen.

Formula: The calculator employs the Pythagorean theorem to calculate the diagonal resolution, and then it determines the pixels per inch (PPI) ratio. Using the PPI, the calculator calculates the actual display size by dividing the diagonal resolution by the PPI.

How to Use:

  1. Input the resolution width in pixels.
  2. Input the resolution height in pixels.
  3. Input the diagonal size of the screen in inches.
  4. Click the “Calculate” button.
  5. The result will display the actual display size in inches.

Example: For a screen with a resolution of 1920×1080 pixels and a diagonal size of 24 inches, the Display Size Calculator would suggest an actual display size based on the calculated diagonal resolution and PPI.


  1. Why is knowing the actual display size important?
    • Understanding the physical dimensions of a screen is crucial for design, multimedia content creation, and user interface considerations.
  2. Can I use this calculator for any type of display, including TVs and monitors?
    • Yes, the calculator is suitable for determining the actual display size of various types of screens.
  3. Does the calculator consider bezels or screen borders?
    • No, the calculator assumes the entire diagonal size as the active display area and does not account for bezels.
  4. Can I use this calculator for non-rectangular displays, such as curved monitors?
    • The calculator is optimized for rectangular displays; results for non-rectangular displays may vary.
  5. Is the result affected by the aspect ratio of the screen?
    • No, the calculator calculates the diagonal resolution independently of the aspect ratio.
  6. What if I don’t know the diagonal size of my screen?
    • The calculator requires the diagonal size to provide accurate results; measure the diagonal length for precise calculations.
  7. Does the calculator consider display scaling settings in operating systems?
    • No, the calculator assumes a 1:1 mapping of pixels to inches and does not account for display scaling.
  8. Can I use this calculator for projectors or other projection displays?
    • While the calculator is designed for screens, it can be used for projectors if the resolution and diagonal size are known.
  9. What if the calculated display size is different from the manufacturer’s specifications?
    • Manufacturer specifications may include non-visible areas, such as bezels; the calculator provides a representation of the active display area.
  10. Can I use this calculator for mobile devices and tablets?
    • Yes, the calculator is versatile and can be used for various devices with screens, including mobile devices and tablets.

Conclusion: The Display Size Calculator is a valuable tool for professionals and enthusiasts seeking to understand the physical dimensions of their screens. By considering resolution and diagonal size, this calculator provides accurate insights into the actual display size, facilitating better design decisions and enhancing the overall user experience.

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