40-Inch TV Dimensions

A 40-inch 16:9 TV is approximately 34.9 inches wide and 19.6 inches tall.

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How to use this tool

Enter diagonal size and aspect ratio in the fields above.
Results update instantly as you type — or click Calculate.
Read your width and the full breakdown beneath it.

Calculate the width and height of a 40-inch TV — a popular mid-range size for small living rooms.

Frequently asked questions

How wide is a 55-inch TV?: A 55-inch 16:9 TV is approximately 47.9 inches (121.8 cm) wide and 27.0 inches (68.5 cm) tall.