Screen Size Converter
A 15.6-inch screen has a 39.624 cm diagonal. Enter any diagonal and aspect ratio to estimate the visible display width and height.
How screen width and height are calculated
The diagonal and aspect ratio form a right triangle. For an aspect ratio of width w to height h, use:
height = diagonal × h ÷ √(w² + h²)
Common screen sizes
- 13.3-inch screen in cm
- 14-inch screen in cm
- 15.6-inch screen in cm
- 17.3-inch screen in cm
- 21.5-inch screen in cm
- 24-inch screen in cm
- 27-inch screen in cm
- 32-inch screen in cm
- 43-inch screen in cm
- 55-inch screen in cm
- 65-inch screen in cm
- 75-inch screen in cm
- 85-inch screen in cm
Approximate 16:9 display dimensions
These measurements describe the visible display area. The full device will be larger because of its bezel, stand, and casing.
| Diagonal | Width | Height |
|---|---|---|
| 13.3 in (33.78 cm) | 11.59 in (29.44 cm) | 6.52 in (16.56 cm) |
| 15.6 in (39.62 cm) | 13.6 in (34.54 cm) | 7.65 in (19.43 cm) |
| 24 in (60.96 cm) | 20.92 in (53.13 cm) | 11.77 in (29.89 cm) |
| 27 in (68.58 cm) | 23.53 in (59.77 cm) | 13.24 in (33.62 cm) |
| 32 in (81.28 cm) | 27.89 in (70.84 cm) | 15.69 in (39.85 cm) |
| 55 in (139.7 cm) | 47.94 in (121.76 cm) | 26.96 in (68.49 cm) |
Choosing a screen by physical size
Use the converted diagonal to compare display panels, but check the manufacturer's full width, height, and depth specifications when fitting a laptop sleeve, monitor arm, cabinet, or TV wall.
Read the screen diagonal, width, and height guide →
Related screen and length conversions
Screen Size Converter: what this tool solves
The Screen Size Converter helps users understand advertised screen diagonals in centimeters and estimate the visible width and height of a display. It is designed for laptops, monitors, tablets, TVs, and projector screens where diagonal size alone does not explain physical fit.
Who this tool is for
- People shopping for laptops, monitors, tablets, TVs, projector screens, or display accessories.
- Users who know the advertised diagonal size but need centimeters, width, height, or fit context.
- Buyers checking whether a display fits a desk, wall, cabinet, monitor arm, bag, or room.
What users usually need to do
- Convert an advertised screen diagonal from inches to centimeters.
- Estimate visible width and height from diagonal size and aspect ratio.
- Understand that diagonal size is not the same as physical device width, height, or bezel size.
How it works
- Enter the advertised diagonal screen size in inches.
- Choose the aspect ratio, such as 16:9.
- The calculator converts the diagonal to centimeters and estimates the display width and height using the aspect-ratio triangle.
Formula / calculation method
A screen diagonal forms a right triangle with width and height. The aspect ratio controls how that diagonal is split between width and height. Bezels, stands, and casings are not included.
Examples
Example: 15.6-inch 16:9 screen
Input: 15.6-inch 16:9 screen
Result: 39.62 cm diagonal
Common laptop display size.
Example: 24-inch 16:9 monitor
Input: 24-inch 16:9 monitor
Result: 60.96 cm diagonal
Common desktop monitor size.
Example: 55-inch 16:9 TV
Input: 55-inch 16:9 TV
Result: 139.7 cm diagonal
Common television class.
Common screen diagonal conversions
| Input | Result | Note |
|---|---|---|
| 13.3-inch display | 33.78 cm diagonal | Common reference value |
| 15.6-inch display | 39.62 cm diagonal | Common reference value |
| 24-inch display | 60.96 cm diagonal | Common reference value |
| 32-inch display | 81.28 cm diagonal | Common reference value |
| 55-inch display | 139.7 cm diagonal | Common reference value |
Use cases
- Checking whether a monitor or TV will fit a desk, cabinet, or wall area.
- Understanding laptop and tablet display sizes across US and metric specs.
- Estimating visible display width and height before buying accessories.
Tips and best practices
- Remember that advertised screen size is diagonal, not width.
- Check the manufacturer's full product dimensions when fit matters.
- Use the same aspect ratio when comparing two screens by width and height.
Related tools
Frequently asked questions
How are screen sizes measured?
Screen sizes are measured diagonally across the visible display area.
Is a 15.6-inch screen 15.6 inches wide?
No. 15.6 inches is the diagonal. Width depends on the aspect ratio.
How many centimeters is a 24-inch screen?
A 24-inch screen has a 60.96 cm diagonal.
Does screen size include the bezel?
Usually not. The advertised size normally describes the display panel, not the full device.
Why do aspect ratios matter?
Two screens with the same diagonal can have different width and height if their aspect ratios differ.