Screen Size Calculator
Compute width and height from diagonal and aspect ratio.
Input Data
Diag
Ratio W
Ratio H
Results
Width in centimetres.
53.1
Explanatory note about the result.
寬 ≈ 53.1 cm、高 ≈ 29.9 cm（16:9）。
At a glance:Given diagonal d (in) and ratio W:H, width = d × W/√(W²+H²), height = d × H/√(W²+H²), converted to cm with 1 in = 2.54 cm. Complements aspect-ratio, pixel and resolution calculators.
Formula
width = d × W / √(W²+H²); height = d × H / √(W²+H²).
cm = inches × 2.54.
How to Use
- Enter diagonal inches and the ratio width/height.
- The tool returns width and height in cm.
Case Studies
24in 16:9 → 53.1×29.9 cm
width=24×16/√337×2.54≈53.1 cm; height≈29.9 cm.
FAQ
Why use the diagonal?
Screens are marketed by diagonal; the true width/height follow from the aspect ratio.
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References
Content review: Calculatorism Science Team. Results are for reference only; please refer to the relevant authorities for the official figures.