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Screen Size Calculator

Find physical screen width and height from the diagonal and aspect ratio.

01 / inputs

in
ratio
ratio

02 / result

SCREEN DIMENSIONS

23.5325 × 13.2371 in

Width
23.5325 in / 59.7727 cm
Height
13.2371 in / 33.6221 cm

Calculation trace

  1. sqrt(16² + 9²) = 18.35756
    18.35755975
    Aspect-ratio diagonal
  2. 27 × 16 ÷ 18.35756 = 23.53254
    23.5325395 in
    Screen width
  3. 27 × 9 ÷ 18.35756 = 13.237053
    13.23705347 in
    Screen height
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How it works

From the diagonal and aspect ratio, width = diagonal × aspectW ÷ √(aspectW² + aspectH²) (height likewise), then converted to centimetres at 2.54 cm per inch.

Assumptions & limits

  • The diagonal is entered in inches.
  • Uses the entered aspect ratio (e.g. 16:9).
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FAQ

Does a bigger diagonal mean more area?
Only at the same aspect ratio. A wider ratio at the same diagonal gives less height and often less area.
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