GlenCalc

Screen size calculator

Screens are sold by diagonal size; the actual width and height depend on the aspect ratio.

Your answer

Width × height23.53 × 13.24 in
Screen area311.5 sq in
Pixel density109 PPI
Resolution2560 × 1440

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How we worked it out

Updated as you change the numbers.

  1. Width = diagonal × a ÷ √(a² + b²); height = diagonal × b ÷ √(a² + b²). PPI = horizontal pixels ÷ width.

Method and assumptions

A 27 in 16:9 screen is 23.5 in wide. Comparing screens with different aspect ratios by diagonal alone is misleading: a 34 in ultrawide is about as tall as a 27 in 16:9.

Questions

How wide is a 27 in 16:9 monitor?

23.53 × 13.24 in; at 2560 pixels wide, 109 PPI.

Sources

Method and figures checked on . Every worked answer on this page is covered by an automated test. Found a mistake? Tell us.

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