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# How do you measure a TV screen?

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A lot of consumers think that a television's screen size is the width of the screen from left to right. But in reality, it is a diagonal measurement.

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1. ### Position the measuring tape

Get a measuring tape. Place one end at the lower-left corner of the television screen. Have someone hold the other end at the upper-right corner of the screen.

2. ### Mark the distance

Mark the distance. If the tape is at 42 inches, for instance, the TV has a 42-inch screen. This size is what retailers mean when they say, "42-inch TV."

3. ### Identify the screen ratio

A standard TV screen ratio is 4:3, but a wide-screen ratio is 16:9, according to Radio Shack. The standard ratio means that the screen has 4 inches of width for every 3 inches of length.

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## Related Questions

• A:

The screen size of 55-inch television with a widescreen, 16:9 aspect ratio is 47.94 inches wide by 26.96 inches tall. The actual dimensions of a television depend on the housing containing the screen and electronics. For example, a cathode ray tube television has significantly more depth than a flat-screen television.

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• A:

Televisions are measured according to their screen size, diagonally across the screen. To measure a TV, take a tape measure and use the bottom left-hand corner as a starting point. Stretch the measuring tape upward across the screen, diagonally to the top right-hand corner. The length is the screen's measurement.

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• A:

To accurately measure the size of a TV screen, measure the width from the TV's lower left corner to its upper right corner. It is the measure of this diagonal line that is used to specify a TV's screen size.