When measuring the space for your TV, ensure you take the height and width of the space you're looking to fill. Of course, if ...

How to Measure a TV and Figure Out What Size You Need The goal of measuring a TV (and/or the space where you want your TV to go) is to figure out the screen size that suits your space.

In other words, how many pixels per inch depends on the size and resolution of the screen you're talking about, so we'll have to do some math to get the number you're after for yours.