Screen Size Calculator (TV, Monitor & Display Dimensions)
Screen Size Calculator
Use this screen size calculator to estimate screen width and height from a diagonal size and aspect ratio. It works for TVs, monitors, laptops, tablets, and other displays.
✅ Instant Screen Size Calculator
📌 Screen Size Formula
Screen size is measured diagonally, not by width or height.
To calculate width and height, the diagonal size is combined with the chosen aspect ratio.
For example, a 55-inch 16:9 screen is about 121.8 cm wide and 68.5 cm high.
📊 Common Screen Sizes (16:9)
| Diagonal | Width | Height |
|---|---|---|
| 24" | 53.1 cm | 29.9 cm |
| 27" | 59.8 cm | 33.6 cm |
| 32" | 70.8 cm | 39.8 cm |
| 43" | 95.2 cm | 53.5 cm |
| 50" | 110.7 cm | 62.3 cm |
| 55" | 121.8 cm | 68.5 cm |
| 65" | 143.9 cm | 80.9 cm |
| 75" | 166.0 cm | 93.4 cm |
📏 How to Measure Screen Size
Screen size is measured from one corner of the visible screen area to the opposite corner, diagonally. It does not include the bezel or frame around the display.
This is why a 55-inch TV does not mean the screen is 55 inches wide. The actual width depends on the aspect ratio.
❓ Common Questions
How wide is a 55-inch TV?
A 55-inch TV with a 16:9 aspect ratio is about 121.8 cm wide.
How wide is a 65-inch TV?
A 65-inch TV with a 16:9 aspect ratio is about 143.9 cm wide.
Does aspect ratio matter?
Yes. Two screens with the same diagonal size can have different widths and heights if their aspect ratios are different.
Is screen size measured diagonally?
Yes. Screen size is almost always measured diagonally across the visible display.
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🎸 Shop All InstrumentsDisclaimer: This tool and information are provided for general reference only. Results are approximate and may vary slightly depending on manufacturer measurements, bezels, rounding, and display design. Always check official product specifications before purchasing.