Last updated: March 2, 2026

How to Calculate TV Screen Dimensions

Formula

TVs are measured diagonally. Use trigonometry with the aspect ratio to find actual width and height.

The ideal viewing distance is roughly 1.5 to 2.5 times the diagonal for 4K TVs.

Common use cases:

  • Determine if a TV fits your wall
  • Find the ideal viewing distance
  • Compare screen areas between sizes

Frequently Asked Questions

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