Dell UltraSharp U4021QW 40" 4K IPS Curved Monitor

Dell UltraSharp U4021QW 40" 4K IPS Curved Monitor

Dell UltraSharp U4021QW 40" 4K IPS Curved Monitor

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Stay productive and immersed with the Dell UltraSharp U4021QW 40" 4K IPS Curved Monitor. Featuring a 40" Thin Film Transistor (TFT) panel, this monitor features a 2500R curved screen and a 5120 x 2160 resolution. Stay productive by docking your laptop to this display's Thunderbolt 3 port that supports data and video, as well as 90W of power delivery, or connect this display to your system using DisplayPort and HDMI inputs. A USB Type-A to Type-B data cable can be used to enable the built-in USB hub, which consists of a USB 3.2 Gen 2 Type-C port with 15W of power delivery and four USB 3.2 Gen 2 Type-A ports. An RJ45 port is also available, enabling wired internet connectivity.

Designed to deliver accurate colors, this monitor supports 1.07 billion colors, 100% of the sRGB color gamut, and 98% of the DCI-P3 gamut. Videos are displayed smoothly thanks to an 8 ms (GtG) response time, which can be overdriven to 5 ms, paired together with a 60 Hz refresh rate with DisplayPort and 30 Hz using HDMI. Additionally, a 1000:1 static contrast ratio and 300 nits of brightness help provide clear and sharp visuals. For viewing comfort, users can adjust the height, swivel, and tilt of the included stand to find the ideal viewing angle or attach the monitor to a third-party compatible mount using the 100 x 100mm VESA pattern.

Key Features of the Dell UltraSharp U4021QW 40" 4K IPS Curved Monitor

  • 40" 21:9 TFT Panel
  • 5K WUHD 5120 x 2160 at 60 Hz
  • 1000:1 Static Contrast Ratio
  • 1.07 Billion Colors Supported
  • 2500R Curved Screen
  • HDMI | DisplayPort | Thunderbolt 3
  • 5 ms (GtG) Response Time
  • 300 nits Brightness
  • 98% DCI-P3 Coverage
  • Integrated USB Hub & RJ-45 Port


More Screen to Captivate

Stay on task with immersive productivity on the world's first 40" curved ultrawide WUHD 5K2K monitor. With 35% more onscreen space than a 32" 4K 16:9 screen, you have room to view all of your work at once.

A View That Draws You In

The 2500R curved screen creates a wider field of view, minimizes reflection, and offers near uniform visual focus, for a comfortable, panoramic, wrap-around view.

Unmatched Clarity

Across that additional screen space, you'll see fine, intricate details with ultra high 5120 x 2160 resolution and a 140 ppi pixel density.

Consistent, Vibrant Colors

Expect consistent color and picture quality across a wide viewing angle, with IPS technology. See true-to-life color with an incredible color depth of 1.07 billion colors and wide color coverage across industry standards, including 100% sRGB, 100% Rec. 709, and 98% DCI-P3. DCI-P3 enables a wider range of colors and is quickly becoming the color standard for creating and viewing content.

All-Encompassing Sound

Integrated dual 9W speakers deliver quality sound for an auditory experience that pulls you in even further.

Connect to Productivity

With Thunderbolt 3 and RJ45, this monitor serves as a productivity hub that delivers stable Ethernet and up to 90W of power delivery – all in a clutter-free setup.

Lightning Speed

Thunderbolt 3 delivers speeds of up to 40 Gb/s, creating one compact port that does it all.

Extensive Connectivity

Easily connect to a variety of devices with extensive connectivity options, including Thunderbolt 3, DisplayPort 1.4, HDMI, and super speed USB 10 Gb/s. Plus, quick-access USB Type-C and super speed USB 10 Gb/s ports conveniently located at the front, enable fast connection to peripherals, such as storage devices and mobile phones with up to 15W of charging capability.

Enhanced Manageability

MAC Address pass-through, PXE Boot, and Wake-on-LAN are conveniently built in.

Multitask Efficiently

Effortlessly connect two PC sources to your monitor. Dell's intelligent Auto KVM feature detects the second connected PC and seamlessly switches controls over. View content from both PC sources with Picture-by-Picture (PbP) and Picture-in-Picture (PiP), and use KVM (keyboard, video, and mouse) to control both PCs with a single keyboard and mouse.

Easy on the Eyes

Experience vibrant color that's easy on your eyes with ComfortView Plus, an always-on, built-in low blue light screen that reduces harmful blue light emissions while delivering excellent color performance.

Beauty Meets Function

Crafted with a premium, platinum silver finish, this stylish monitor features a compact base and a hidden cable management design that runs the cables through the monitor riser for a clutter-free setup. Plus, you can navigate the menu and adjust screen settings with the easy-to-use joystick control.


Dell is committed to diversity and is continually improving the user experience for all users. In their ongoing efforts to strive for digital accessibility, this monitor meets Section 47 CFR 79.107 of the 21st Century Communications and Video Accessibility Act (CVAA). Select on-screen text menus and commands, displayed via the On-Screen Menu function, will be narrated using text-to-speech synthesis to aid accessibility of the visually impaired.

Productive at Every Level

Easy Arrange allows you to easily tile multiple applications across one or more screens with 38 pre-set window partitions and the ability to personalize up to five windows, giving you improved multitasking abilities.

Seamless Transitions

The auto-restore feature remembers where you left off, so applications will go back to where you left them, even after you've unplugged.

More Ways to Manage

Asset management reports allow IT managers to quickly capture and track monitor information as well as configure multiple monitors at once through a single setup.

The Key to Convenience

Shortcut keys can save you even more time, letting you easily configure your display management settings so you can get to work faster.

Environmental Standards

This monitor meets the latest regulatory and environmental standards such as EnergyStar, TCO Certified, and registered under EPEAT.

Eco-Conscious Packaging

To reduce our manufacturing impact on the environment, this monitor is shipped Styrofoam-free, and the paper-based packaging is made of at least 75% recycled cardboard.

Energy Conservation

Save energy when your monitor is not in use with PowerNap, a feature that dims or puts your monitor to sleep when it's not in use.


  • MPN - U4021QW
  • GTIN - TBA
Size 40"
Panel Type TFT LCD
Aspect Ratio 21:9
Resolution 5120 x 2160
Maximum Brightness 300 nits / cd/m2
HDR Compatibility None
Contrast Ratio 1000:1
Response Time 8 ms (GtG)
5 ms (Overdrive)
Refresh Rate 60 Hz
Variable Refresh Technology None
Bit Depth / Color Support 10-Bit (1.07 Billion Colors)
Color Gamut 100% sRGB
98% DCI-P3
Viewing Angle (H x V) 178 x 178°
Screen Area 36.59 x 15.43" / 92.928 x 39.204 cm
Curvature 2500R
Pixels Per Inch (ppi) 140 ppi
Finish Anti-Glare / Matte
Touchscreen Technology None
Hardness Rating Hardness Rating