Home Theater & Entertainment TV & Displays 52 52 people found this article helpful How to Measure a TV Screen You can easily measure TV screens to find the right size for your room by Robert Silva Writer Robert Silva has written about audio, video, and home theater topics since 1998. Robert has written for Dishinfo.com, and made appearances on the YouTube series Home Theater Geeks. our editorial process Facebook Twitter LinkedIn Robert Silva Updated on July 01, 2020 2020 TV Buying Guide 2020 TV Buying Guide Introduction TV Basics What is a Smart TV? What Are Pixels? HDR Formats Explained HDTV, HDMI, DVI or HDCP Measuring a TV Screen How Room Lighting Affects TVs TV Buying Guide What Is 4K? LCD vs LED All About OLED TVs QLED vs OLED Extended Warranties What is a Roku TV? The Best TV For You Best TVs of 2020 Best 4K Ultra HD TVs Best TV Brands Best Cheap TVs Best Smart TVs Best Outdoor TVs Best Gaming TVs Best TVs Under $500 Best Online TV Retailers Best TVs by Brand Best LG TVs Best Roku TVs Best Vizio TVs Best TVs at Walmart Best Samsung TVs Best Sony TVs Best Hisense TVs Best TVs by Size Best 40-inch Smart TVs Best 42-inch TVs Best 48-inch TVs Best 60-inch TVs Best 65-Inch 4K TVs Best 75-Inch TVs Best 80-85 inch TVs Best 26-29 inch LED TVs Best 32-39 inch LED TVs Best TV Accessories Best TV Antennas Best TV Stands Best TV Wall Mounts Best Under Cabinet TVs & Mounts Best Surge Protectors Best HDMI Cables Best Blu-Ray Players Best Devices for Streaming TV Tweet Share Email Just because the space you have for your TV is 55", will your new TV really fit the space? Before you head out the door to get that great flat-screen TV deal with the ad in hand and cash in pocket, make sure it's the size you think it is. Here are the TV measurements you need to know. Diagonal Screen Size.Frame/Bezel Dimensions with and without provided stand for platform vs wall mounting.The space your TV is going to be placed in. Diagonal Screen Size When you see an ad for a TV, the screen size is what stands out the most. The promoted screen size refers to the diagonal length stated in inches. Diagonal length is measured from one corner to the opposite corner of the screen surface (bottom left to top right or top left to bottom right). Samsung However, the publicly promoted diagonal screen size does not always reflect the actual viewable screen size. To combat accusations of false advertising for flat-screen TVs, the term "class" is often used. This means that an advertised TV might be referred to as a 55-inch "class TV". The reason for this is that the frame/bezel needs to cover a small portion of the panel in order to secure it. Listed below are examples of standard total diagonal screen size versus actual viewable diagonal screen size (all sizes represented in inches). Advertised Diagonal Screen Size Actual Diagonal Screen Size 40 39.9 55 54.6 65 64.5 70 69.5 75 74.5 85 84.5 The TV Frame/Bezel and Stand Although the diagonal screen measurement determines the relative TV screen viewing area, it doesn't tell you precisely if the TV will fit within a given space. You also need to take into account the actual width and height of the entire TV frame, bezel, and stand. Frames/bezels can add anywhere from 1/2 to 3 inches to the width and/or height of the TV frame and the stands add several more. Stands also add more depth. Samsung What this means is that whether you are ordering a TV online or before going to the store, make sure you note the listed size of the entire TV, which not only includes the screen but the frame/bezel and stand. If you have some TV brands and models in mind, most manufacturers post both TV product and package dimensions on their web pages. However, even if you have that information in hand, if you are going to a store to purchase your TV, take a tape measure with you in case the TV is on display. You can then check or confirm the entire exterior dimensions of the TV. If the TV is not on display, but only in a box, check the box for any listed specifications regarding the size of the TV with, and without its stand. Measure the Space Your TV Is Going to Be Placed In Knowing the size of the entire TV provides the information on how much space it needs for placement, but you need to make sure that you have also measured the width and height available of the space that your TV is going to be placed in. If the TV is going in an open space or on a wall, the main consideration is that there is space for the stand and the wall space doesn't have any borders you may have to contend width. However, if placing your TV in an enclosed space, such as an entertainment center, be sure to leave at least a 2-to-3 inch space on both the left and right side as well as the top and bottom (including the stand) of the TV so it can be safely and easily move in and out of place. Yurdakul / Getty Images It is also a good idea to connect everything to your TV before moving it into place, as the TV connections may be located on both the back and sides of the TV. Don't forget to take both your recorded measurements and your tape measure to the store with you. Raygun / Getty Images In addition to measuring the TV and space it is going to be placed in, it is also important to take your seating distance and viewing angle into consideration. More from Lifewire What Is an Aspect Ratio and Why Is It Important? How to Make Your New Car Radio Fit Top 10 Home Theater Mistakes and How to Avoid Them Curved Screen TVs – What You Need to Know Before You Buy How Many Pixels in an Inch (PPI)? 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