Screen Size Calculator

Convert diagonal inches into exact visible screen width and height for common TV and monitor aspect ratios.

Visible Panel Size

How to Use

  1. 1

    Enter your TV or monitor diagonal size in inches.

  2. 2

    Select the display aspect ratio (for most TVs use 16:9).

  3. 3

    Click Calculate to get the exact panel width and height.

Formula

Width = Diagonal x (AspectW / sqrt(AspectW^2 + AspectH^2))
Height = Diagonal x (AspectH / sqrt(AspectW^2 + AspectH^2))

This gives visible screen dimensions only and excludes bezel, frame, or stand size.

Disclaimer: Results are geometric estimates for planning. Verify manufacturer spec sheets before buying mounts or furniture.

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Aspect Ratio Calculator
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Viewing Distance Calculator
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Tip

A 55-inch 16:9 screen is roughly 47.9 in wide x 27.0 in high, not 55 inches wide.