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An Ultra High-Definition TV (UHDTV) is a television format with higher spatial resolution than conventional high-definition television. In everyday TV shopping, UHD usually means either 4K at 3840 × 2160 pixels or 8K at 7680 × 4320 pixels. The UHD label describes resolution and related image formats; by itself, it does not promise HDR or 4K streaming.
What does Ultra High-Definition TV mean?
The International Telecommunication Union (ITU) describes UHDTV as a television application designed to improve the viewing experience, especially through greater spatial resolution and a wider field of view. ITU-R Report BT.2246-4 puts the goal this way: “UHDTV is a television application that is intended to provide viewers with an enhanced visual experience primarily by offering a wide field of view that virtually covers all of the human visual field with appropriate sizes of screens relevant to usage at home and in public places.”
For consumers, the most useful distinction is the number of pixels in the picture. ITU-R’s 2015 report gives these UHDTV formats:
| Format | Resolution | Pixels per frame |
|---|---|---|
| 4K UHD | 3840 × 2160 | 8,294,400 |
| 8K UHD | 7680 × 4320 | 33,177,600 |
The pixel totals are calculated from those dimensions. An 8K image has four times as many pixels as a 4K image, but the numbers alone do not establish which TV will look better overall.
#1 Best Overall
- 4k Ultra HD (2160p resolution): Enjoy breathtaking HDR10 4K movies and TV shows at 4 times the resolution of Full HD, and upscale your current content to Ultra HD-level picture quality.
- High Dynamic Range: Provides a wide range of color details and sharper contrast, from the brightest whites to the deepest blacks.
- All-in-one: Get right to your good stuff. With Fire TV, you can enjoy a world of entertainment from apps like Prime Video, Netflix, Disney+, Hulu, and HBO Max. Plus, stream for free with Fire TV Channels, Pluto TV, Tubi, and more. Access over 1.8 million movies and TV episodes. Subscriptions may be required. Feature and content availability may vary.
- Smart Home: Your smart home hub. Pair Fire TV with compatible smart home devices to see live camera feeds, use AirPlay, control your lighting and thermostat, and more.
- Free Content: Stream for free. Access over 1 million free movies and TV episodes from popular ad-supported streaming apps like Fire TV Channels, Tubi, and Pluto TV. Subscriptions may be required. Feature and content availability may vary.
Is UHD the same as 4K?
In ordinary television shopping, “4K UHD” is the familiar UHD tier, with a resolution of 3840 × 2160. UHD is the broader format family: it also includes 8K UHD at 7680 × 4320. The term “4K” is sometimes used loosely, so the stated pixel dimensions are the clearest way to identify a television’s resolution.
The Consumer Technology Association (CTA) has a consumer definition for a 4K Ultra High-Definition display that involves more than its resolution. Its criteria include at least 8 million active pixels; at least 3840 horizontal and 2160 vertical pixels; a native aspect ratio of 16:9 or wider; upconversion capability; specified HDMI input support; color processing; and a minimum bit depth. This is CTA’s published consumer definition, not a claim that every UHD-related standard or jurisdiction uses the same checklist.
Rank #2
- 4k Ultra HD (2160p resolution): Enjoy breathtaking HDR10 4K movies and TV shows at 4 times the resolution of Full HD, and upscale your current content to Ultra HD-level picture quality.
- High Dynamic Range: Provides a wide range of color details and sharper contrast, from the brightest whites to the deepest blacks.
- All-in-one: Get right to your good stuff. With Fire TV, you can enjoy a world of entertainment from apps like Prime Video, Netflix, Disney+, Hulu, and HBO Max. Plus, stream for free with Fire TV Channels, Pluto TV, Tubi, and more. Access over 1.8 million movies and TV episodes. Subscriptions may be required. Feature and content availability may vary.
- Smart Home: Your smart home hub. Pair Fire TV with compatible smart home devices to see live camera feeds, use AirPlay, control your lighting and thermostat, and more.
- Free Content: Stream for free. Access over 1 million free movies and TV episodes from popular ad-supported streaming apps like Fire TV Channels, Tubi, and Pluto TV. Subscriptions may be required. Feature and content availability may vary.
What is the difference between UHD and HDR?
UHD and high dynamic range (HDR) describe different image attributes. UHD concerns resolution and related image formats; HDR concerns the handling and presentation of a wider range of brightness and color. ITU’s 2016 announcement describes HDR-TV as a development building on UHDTV.
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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →A UHD label alone does not tell you which HDR formats a TV supports, how bright its screen gets, or how convincing its HDR picture will be. If those features matter, check the television’s supported HDR formats and its actual display performance separately from its resolution.
Rank #3
- 4K Ultra HD (2160p resolution): Enjoy breathtaking HDR10 4K movies and TV shows at 4 times the resolution of Full HD, and upscale your current content to Ultra HD-level picture quality.
- High Dynamic Range: Provides a wide range of color details and sharper contrast, from the brightest whites to the deepest blacks.
- Alexa voice control: The Alexa Voice Remote lets you easily control your entertainment, search across apps, switch inputs, and more using just your voice. Press and hold the voice button and ask Alexa to easily find, launch, and control content, and even switch to cable.
- Access thousands of shows with Fire TV: Watch over 1 million streaming movies and TV episodes with access to thousands of channels, apps and Alexa skills, including Prime Video, Netflix, Hulu, HBO Max, YouTube, Apple TV+, Disney+, ESPN+, Sling TV, Paramount+, and other services right from this TV.*
- DTS Virtual-X Sound: An immersive sound format creates a three-dimensional sound experience with your TV’s speakers.
Does a UHD TV automatically support 4K streaming?
No. A UHD resolution says what a display can show, not whether the television can connect to a service, decode its video, or play its 4K content. CTA’s Connected 4K UHD definition adds IP video decoding, networking, and application services to its 4K UHD display criteria.
To watch 4K streams, the display needs a compatible content source and a capable delivery and playback path. That can involve the TV’s connected platform or an external device, as well as access to content delivered in 4K. A UHD screen on its own does not establish any of those capabilities.
Rank #4
- 4k Ultra HD (2160p resolution): Enjoy breathtaking HDR10 4K movies and TV shows at 4 times the resolution of Full HD, and upscale your current content to Ultra HD-level picture quality.
- High Dynamic Range: Provides a wide range of color details and sharper contrast, from the brightest whites to the deepest blacks.
- All-in-one: Get right to your good stuff. With Fire TV, you can enjoy a world of entertainment from apps like Prime Video, Netflix, Disney+, Hulu, and HBO Max. Plus, stream for free with Fire TV Channels, Pluto TV, Tubi, and more. Access over 1.8 million movies and TV episodes. Subscriptions may be required. Feature and content availability may vary.
- Smart Home: Your smart home hub. Pair Fire TV with compatible smart home devices to see live camera feeds, use AirPlay, control your lighting and thermostat, and more.
- Free Content: Stream for free. Access over 1 million free movies and TV episodes from popular ad-supported streaming apps like Fire TV Channels, Tubi, and Pluto TV. Subscriptions may be required. Feature and content availability may vary.
What should you check beyond the UHD label?
When comparing televisions, treat resolution as one specification rather than a complete picture-quality verdict. Check the features that match how you plan to watch:
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Best Value
- 4K Ultra HD (2160p resolution): Enjoy breathtaking HDR10 4K movies and TV shows at 4 times the resolution of Full HD, and upscale your current content to Ultra HD-level picture quality.
- High Dynamic Range: Provides a wide range of color details and sharper contrast, from the brightest whites to the deepest blacks.
- Alexa voice control: The Alexa Voice Remote lets you easily control your entertainment, search across apps, switch inputs, and more using just your voice. Press and hold the voice button and ask Alexa to easily find, launch, and control content, and even switch to cable.
- Access thousands of shows with Fire TV: Watch over 1 million streaming movies and TV episodes with access to thousands of channels, apps and Alexa skills, including Prime Video, Netflix, Hulu, HBO Max, YouTube, Apple TV+, Disney+, ESPN+, Sling TV, Paramount+, and other services right from this TV.*
- DTS Virtual-X Sound: An immersive sound format creates a three-dimensional sound experience with your TV’s speakers.
- Resolution: Confirm whether the screen is 4K UHD (3840 × 2160) or 8K UHD (7680 × 4320).
- HDR: Look up supported HDR formats and assess display performance separately; “UHD” does not specify either.
- Inputs and playback: Check the HDMI and other input capabilities needed for your devices.
- Connected viewing: Confirm that the TV or playback device can access and decode the UHD content you intend to watch.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
