What is the viewport size of the 4K UHD?

The 4K UHD has a viewport size of 1920×1080 CSS pixels with a device pixel ratio of 2x. Its physical screen resolution is 3840×2160 pixels on a 27 inch display.

Which CSS breakpoint does the 4K UHD use?

The 4K UHD (1920px wide) falls into the "2xl" breakpoint in Tailwind CSS, "xxl" in Bootstrap 5, and "xl" in Material UI.

What is the device pixel ratio of the 4K UHD?

The 4K UHD has a device pixel ratio (DPR) of 2x, meaning each CSS pixel is rendered using 2×2 = 4 physical pixels. This gives the display sharp, high-density rendering for text and images.

Monitor Generic

4K UHD Viewport Size

1920×1080 CSS pixels · 3840×2160 physical pixels · 2x DPR

Display Specifications

Viewport Width

1920px CSS pixels

Viewport Height

1080px CSS pixels

Physical Width

3840px hardware pixels

Physical Height

2160px hardware pixels

Device Pixel Ratio

2x 1 CSS px = 2×2 physical px

Colour Depth

24-bit 8-bit per channel

Screen Size

27 inch diagonal

Aspect Ratio

16:9

Operating System

Any

Release Year

2020

Touch Support

CSS Breakpoint Mapping

At 1920px wide, the 4K UHD falls into these CSS framework breakpoints:

Tailwind CSS v4

2xl

min-width: 1536px

Bootstrap 5

xxl

min-width: 1400px

Material UI v6

min-width: 1536px

Related Devices

Full HD (1080p)

1920×1080 · 1x DPR

2xl

QHD (1440p)

2560×1440 · 1x DPR

2xl

Ultrawide 34″

3440×1440 · 1x DPR

2xl

Dell U2723QE

1920×1080 · 2x DPR

2xl

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