Work with screen diagonal and aspect ratio to estimate width and height.
Screen Size Calculator
How to Use
- Enter diagonal and aspect ratio.
- View width and height estimates.
Formula
For ratio w:h and diagonal d: width = d / sqrt(1+(h/w)²) (scaled to ratio).
Worked Example
Example: 27-inch 16:9 display has width and height derived from the diagonal.
What the Result Means
Useful when shopping for monitors; bezels are not included.
Important Notes & Limitations
- Physical size ≠ resolution sharpness.
Frequently Asked Questions
Does this set resolution?
No—only physical dimensions from diagonal and ratio.
Ultrawide?
Enter the correct aspect ratio (e.g., 21:9).
Phones?
Same geometry applies.
PPI?
Need resolution pixels as well—not in this basic tool.
Related Calculators
See also: Storage Calculator.
Disclaimer: Results are approximate and for educational and informational purposes only. They are not financial, tax, medical, or legal advice. Verify important decisions with a qualified professional.