Screen Size
Estimate a rectangular screen’s width and height from its diagonal and aspect ratio. This compares the active display area rather than the outside dimensions of the product and its bezel.
- Runs in your browser
- Nothing is uploaded
- No signup; device limits apply
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How to use this tool
Enter the diagonal in inches and choose or supply a positive aspect ratio. Curved displays and unusual active areas can differ from this rectangle model, so compare manufacturer dimensions where needed.
Results and examples
A ten-inch diagonal at 4:3 gives eight inches wide and six inches high, or 20.32 by 15.24 centimetres. No bezel thickness is added to those dimensions.
Limitations
- Resolution and pixel density are not inputs to this calculation.
- Stand size, bezels, curvature and installation clearance need a separate check.
Fields
| Field | Guidance and constraints |
|---|---|
| Diagonal (inches) | Check the unit and format displayed beside this field. |
| Aspect ratio | Check the unit and format displayed beside this field. |
| Width ratio | Check the unit and format displayed beside this field. |
| Height ratio | Check the unit and format displayed beside this field. |
Data handling
Processing stays in the current browser tab; the site does not upload tool input for the calculation itself.
Sources
Frequently asked questions
What size is a ten-inch 4:3 screen?
A ten-inch diagonal at 4:3 gives eight inches wide and six inches high, or 20.32 by 15.24 centimetres. No bezel thickness is added to those dimensions.
Is this the complete product size?
Resolution and pixel density are not inputs to this calculation. Stand size, bezels, curvature and installation clearance need a separate check.
