Calculate screen dimensions from diagonal size and aspect ratio.
Physical Specs
Common Sizes
Dimensions Output
Width23.53"59.8 cm
Height13.24"33.6 cm
Area311.5 sq in2009.7 sq cm
Aspect Ratio16:91.78:1
DIAGONAL
27"
W: 23.5"
H: 13.2"
Overview
Screen size calculation determines width and height from diagonal measurement and aspect ratio. TVs measured diagonally. 16:9 standard for HDTV, 21:9 for ultrawide.
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Pro Tips
Bigger diagonal doesn't always mean more area! A 27" ultra-wide screen has less surface area than a 27" 16:9 screen.
PPI (Pixels Per Inch) determines sharpness. To calculate it, divide your horizontal resolution by the physical width calculated here.
For TVs, the ideal viewing distance is approximately 1.2 to 1.6 times the diagonal size.
Ultrawide monitors (21:9) are excellent for productivity as they provide space for multiple side-by-side windows.
