How to Measure a TV Screen: Things to Consider

When it comes to buying a TV, knowing how to measure a TV screen is crucial in finding the right size for your space. But with so many different screen sizes and types available, it can be overwhelming to determine just what size of a TV is right for you. Luckily, measuring the size of a TV screen is a simple process that anyone can do with just a few tools. In this article, I’ll show you the easy way to measure the width, height, depth, and diagonal of a TV’s screen, giving you all the information you need to purchase the perfect size of TV for your home. So, if you’re ready to learn how to measure the screen size, read on!

how to measure a tv screen

How to Measure a TV Screen

There are a few things that you should think about before you begin measuring the dimensions of the TV, despite the fact that it is not very difficult to do so. Learn which aspects are most useful to assess, as well as the reasons why doing so is crucial.

To get measurements to determine the correct space when installing, you should also consider the TV bezel around the screen as well as the fact that the TV has a stand (if you are going to put it, do not hang it on the wall).

how to measure a tv screen

1. Diagonal Screen Measurement

The first step in measuring your TV is to determine the flat screen size. This is the diagonal screen size measurement from corner to corner.

diagonal screen measurement

To measure the TV screen size, you need a measuring tape or ruler. Place one end of the measuring tape or ruler at the bottom right corner of the screen and stretch it diagonally to the top left corner.
Take note of the measurement in inches or centimeters, depending on your preference. This measurement is the size of the TV, which you can use as a reference when shopping for TV stands, wall mounts, or other TV accessories that require measurement.

2. Measure the Width

Knowing the size of the screen, it’s time to measure its width. This measurement is crucial if you plan to place the new TV on a stand or wall mount. Measure from the left edge of the TV to the right edge.

Make sure to measure at the widest point of the TV, which is usually towards the bottom. Double-check your measurement to ensure accuracy.

measure the width

If you plan to place the TV on a stand

Make sure the width of the TV is smaller than the width of the stand. It’s also important to make sure the stand is sturdy enough to support the weight of the TV.

If you plan to mount the TV on the wall

Make sure to choose a wall mount that is compatible with the width of your TV. Most wall mounts will state the maximum TV size they can support, so be sure to check the specifications before making a purchase.

3. Measure the Height of the Screen

The height of the TV is another crucial measurement. It will help you determine how much space you need above the TV if you plan to mount it on the wall. Measure from the bottom edge of the TV to the top edge.

measure the height

Additionally, consider the viewing distance and angle when determining the height of the TV. When seated, the TV screen should be at eye level, so adjust the height accordingly. It’s important to have a comfortable viewing experience that won’t strain your neck or eyes. Read my article to learn more about it.

4. Measure the Depth of the TV

The depth measurement is essential if you plan to place your TV on a shelf or in an entertainment center. Measure from the front of the TV to the back of the TV. Be sure to include any protruding parts, such as the base or stand.

This will help ensure that the TV will fit properly in the space you have designated for it. You should also consider any additional space needed for cords and cables behind the TV. It’s always better to have a little extra space than to try and force a TV into a space that is too small, as this can cause damage to the TV or the surrounding furniture.

measure the depth

Measuring Your Space for Proper Placement

Once you have the TV measurements, you need to measure the space where you plan to place the TV. This will help you determine the optimal TV size for your room. Measure the length and width of the space, and take note of any obstructions such as doors or windows.

How to Determine the Right Viewing Distance from the Screen?

The size of your TV will determine the optimal viewing distance. A larger TV will require a greater viewing distance, while a smaller TV can be viewed from closer up.

You don’t want the TV to be too close or too far from your seating area. A good rule of thumb is to have a viewing distance that is 1.5 to 2.5 times the screen diagonal size. For example, if you have a 50-inch TV, your viewing distance should be around 75 to 125 inches (6.25 to 10.4 feet).

How to Determine the Right Viewing Distance from the Screen

Another factor to consider is the height of the TV. The center of the screen should be at eye level when you are seated. You don’t want to strain your neck or have to look up or down to see the screen.
Once you have all these measurements, you can use online calculators or consult with a sales representative to determine the best size TV for your space and viewing preferences.

If No Tape Measure

If you don’t have a tape measure, you can still measure your TV using everyday items around your home. For example, a dollar bill is approximately 6.14 inches long, while a standard piece of printer paper is 11 inches long. You can use these items to estimate your measurements.

in no tape measure

Another option is to use your body as a measuring tool. For example, the distance between the tip of your thumb and the tip of your pinky finger, when your hand is fully stretched out, is typically around 8 inches. You can use this as a rough estimate for measurements.

Additionally, if you have a ruler or any other flat object with a known measurement, such as a credit card, you can use it to compare against the TV screen and approximate the size.

When all else fails, you can also search the internet for the exact dimensions of your TV make and model. Many manufacturers provide detailed information on their websites, so you can easily find the size of your TV screen without a tape measure.

Go the Digital Route

Alternatively, you can use a digital measuring app to measure your TV. These apps use your smartphone’s camera and sensors to measure objects accurately. Some popular options include Measure, EasyMeasure, and Smart Measure.

measure apps

To use these apps, follow these steps:

  1. Download and install a digital measuring app on your smartphone.
  2. Open the app and calibrate it as per the instructions provided.
  3. Hold your phone at a distance from the TV and align the measuring tool with the edges of the screen.
  4. Move the phone closer or further away until the app shows the correct measurements.
  5. You can take a screenshot of the measurement for future reference.
Note: Keep in mind that digital measuring apps may not be as precise as physical measuring tools, but they can still provide a relatively accurate result.


In conclusion, measuring a TV screen accurately is essential before making a purchase or deciding on the placement of the TV you need. By following these simple steps, you can ensure that you get the right size TV for your space and optimize your viewing experience.


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