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How to Measure TV Size

Whether you're creating a classified ad for selling your current television or getting an idea of what size TV you want to upgrade to, measuring your TV is a relatively simple task. Getting accurate measurements will be essential to make sure you have enough space in the room where you plan to set up your TV. Besides the screen size, there are a number of other important measurements that you'll need to make when you're browsing the market.

What you'll need:

  • Standard tape measure
  • Pen and paper

Step 1: Measure the screen size diagonally.

Measuring screen size is going to be the most important measurement since this is how most retailers list new TVs. Hold the end of the tape measure in one corner and extend it diagonally across to the opposite corner. Make sure the tape measure is inside the housing so you're only measuring the visible screen area. Be sure you write down the measurement. That might seem obvious, but when you start comparing multiple models you'll want all the data laid out clearly in front of you. 


Step 2: Measure the TV's housing.

The housing is the plastic frame of the television. For flat screen models, there generally won't be too much, but can be important if you're planning on mounting the TV in a particular space. Getting the width, height and depth numbers will be important as you look at TV stands and other accessories. Even if the screen size is the same, the complete dimensions between models will vary.