Screen Diagonal Calculator - Free, Instant, In Your Browser
Enter the screen width and height in inches to calculate the diagonal size (the number used in "inch" TV/monitor marketing).
How to use Screen Diagonal Calculator
- 1Enter the required date(s) and details above.
- 2Click Calculate - Screen Diagonal Calculator runs instantly, right in your browser.
- 3Read your result below.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
Diagonal = √(width² + height²), the Pythagorean theorem applied to the screen's rectangle.
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.