If you are buying a new TV, you might be wondering how much resolution really matters. For example, how much of a difference is there between Full HD and 4K? It turns out, there is a big difference.

Each resolution category relates to a specific number of pixels on the screen. Full HD screens have 1920 pixels across and 1080 pixels from top to bottom. That’s a total of over 2 million pixels. Meanwhile, a 4K screen is 4096x2160, which totals more than 8 million pixels. Since each pixel contains a single color to contribute to the overall image, this means that 4K screens allow for four times the amount of detail offered by Full HD screens.

The resolution difference can be particularly meaningful if you have a big screen TV. 4K Ultra HD TV screens will enhance your experience of many cinematic movies as well as high-resolution video games. To take full advantage of your 4K resolution, you should set your games to 4K, ensure your Wi-Fi network is strong enough to stream media in 4K or use a Blu-Ray player with 4K discs.

Choosing the best 4K television is going to be different for each household. Often, it’s easiest to start narrowing your options by considering size. Measure the space you have for your new 4K UHD TV and use those parameters to guide your choice. If you want to mount your TV, you will need to find a compatible TV mount for the size, weight and brand.

You will also need to decide on the refresh rate for your new 4K UHD television. Refresh rates—measured in Hertz—are the number of times per second the image on the screen changes. Ideally, you’ll want the frame rate of the content you are watching to match the refresh rate.

Finally, your image quality will be influenced by what display type you choose. Popular choices include OLED TVs, mini-LED TVs and QLED TVs. There are pros and cons to each depending on your brightness, contrast and vibrancy preferences and the amount of light in the room where your TV will be. And for sound, consider taking your experience to the next level with a sound bar or speaker system.