Diagonal Size Calculator

Introduction: The Diagonal Size Calculator provides a simple and efficient way to find the diagonal size of a display based on its width and height. Whether you’re dealing with a television, monitor, or any other screen, this calculator empowers users to obtain accurate measurements without the need for complex mathematical calculations.

Formula: The calculator relies on the Pythagorean theorem to calculate the diagonal size. In a right-angled triangle, the square of the hypotenuse (diagonal) is equal to the sum of the squares of the other two sides (width and height).

How to Use:

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

Example: Suppose you have a monitor with a width of 18 inches and a height of 12 inches. Using the Diagonal Size Calculator, you can quickly find that the diagonal size is approximately 21.60 inches.


  1. Why is diagonal size important for displays?
    • Diagonal size is a crucial specification as it provides a clear indication of the physical dimensions of a display.
  2. Can I use this calculator for any type of display?
    • Yes, the calculator is versatile and suitable for TVs, monitors, and other screens.
  3. Do I need to input measurements in inches?
    • Yes, the calculator requires measurements in inches for accurate results.
  4. Is the Pythagorean theorem the only way to calculate diagonal size?
    • The Pythagorean theorem is particularly suitable for rectangular displays and is used for its simplicity and accuracy.
  5. Can I use this calculator for non-rectangular screens?
    • No, the calculator assumes a rectangular shape for accurate calculations.
  6. What if my display dimensions are in centimeters?
    • You can convert centimeters to inches before using the calculator.
  7. Can I calculate the diagonal size for a curved display?
    • The calculator is designed for flat, rectangular displays and may not provide accurate results for curved screens.
  8. Is there a limit to the display size this calculator can handle?
    • No, the calculator is suitable for displays of any size, accommodating a wide range of dimensions.
  9. Why is the diagonal size of a display significant?
    • Knowing the diagonal size helps users determine the screen’s overall dimensions and suitability for specific spaces.
  10. Can I round the calculated result to a specific decimal place?
    • The calculator provides the result rounded to two decimal places for simplicity and precision.

Conclusion: The Diagonal Size Calculator is a valuable tool for consumers, tech enthusiasts, and professionals who need a quick and accurate method to determine the diagonal size of displays. By leveraging the Pythagorean theorem, this calculator offers a user-friendly solution, enhancing the understanding of the physical dimensions of various electronic screens.

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