By A laptop screen is fine for one window. Add a second screen and you get room for your work, your notes and your video call at the same time. The wrong monitor wastes that space with the wrong cable or size.
In short: The best monitor for a laptop is a 27 inch screen with a USB-C port that carries video and charges the laptop over one cable, at the resolution your work needs.
For most desks that means a 27 inch 1440p or 4K monitor with USB-C; for a small desk or travel, a 24 inch monitor or a portable screen. Check your laptop ports first, because the ports decide which cable works.
Key takeaways
- Check the laptop ports before you buy. The port decides the cable, not the monitor listing.
- A 27 inch screen suits most desks. Go bigger only if the desk has room and the work needs it.
- USB-C with power delivery is the tidiest setup, but only when the port, the cable and the monitor all support video, and the wattage matches the charger.
- Match resolution to size: Full HD at 24 inch, 1440p or 4K at 27 inch and above.
- Set the monitor to its native resolution and Extend in Windows, or the extra screen will look soft or mirror the laptop.
A 27 inch 4K screen with a USB-C hub that carries video and charges the laptop over one cable.
A 27 inch 4K screen with USB-C that suits photo and video work where fine detail matters.
A 24 inch Full HD screen with HDMI that gives a second screen for a small outlay.
A slim 15.6 inch screen that runs from the laptop USB-C port and fits in a laptop bag.
A 32 inch 4K screen that runs apps on its own, so it works as a display and a small TV.
Check your laptop’s ports first
Every monitor decision starts at the side of the laptop. Look at the ports you actually have: HDMI, DisplayPort, USB-C, or Thunderbolt. A monitor with the wrong input is a monitor you cannot plug in, so this check comes before size, resolution and price.
If you are not sure what each port on your machine does, read our guide to what ports a laptop should have and match it against your laptop. There is more on work from home laptop gear in a separate guide.
The markings on the port tell you what it can do. A USB-C port with a DisplayPort symbol, a small D shape, supports video out. A lightning bolt mark means Thunderbolt, which also carries video.
A plain USB-C port with no mark may carry data and charging only, with no video at all.
When the port has no marking, check the laptop manual or the maker support page for your exact model and look for the words video out, DisplayPort Alt Mode or Thunderbolt. Two laptops that look the same can have different ports.
Count the ports too. If the laptop has one USB-C port and you use it for the monitor, that port is gone for anything else, so a monitor with a built-in USB hub earns its keep.
If the laptop has HDMI and USB-C, run the monitor from HDMI and keep USB-C free for a drive or a hub. Write down the port types and markings: that short list filters every monitor below.
Size and resolution: match the screen to the work
Size and resolution work as a pair. A big screen with too few pixels looks coarse, and a small screen with too many pixels makes text tiny. For most desks: 24 inch at Full HD (1920 by 1080), 27 inch at 1440p, and 27 or 32 inch at 4K. Text stays sharp, and Windows scale stays near 100 percent, which keeps menus at a normal size.
Measure the desk before you pick a size. A 27 inch monitor needs about an arm’s length of viewing distance and a desk deep enough for the stand and the keyboard. A 32 inch screen on a shallow desk sits too close.
A 24 inch screen fits a small desk, a dorm room or a corner setup.
If you plan to keep the laptop open next to the monitor, read our guide to using a laptop as a second monitor for the layout that keeps both screens at a comfortable height.
Resolution decides how much fits on the screen. Full HD is enough for documents, email, calls and web work. 1440p adds room for two windows side by side on a 27 inch screen.
4K suits photo and video editing and design work, where fine detail stays crisp. For documents and calls, 1440p at 27 inch is the sensible middle, and the money saved goes to a better stand or a better cable.
USB-C, HDMI or DisplayPort: which cable to use
USB-C is the tidiest option when it works. One cable can carry the picture, charge the laptop and connect the keyboard and mouse plugged into the monitor hub.
VESA, the group behind the DisplayPort standard, calls this DisplayPort Alt Mode: the USB-C cable carries full DisplayPort video with USB data and power over a single cable. That is why USB-C monitors cost a little more than HDMI-only screens.
We go through improving productivity in a dorm room step by step in its own article.
The catch is that all three parts must support it: the laptop port, the cable and the monitor. A charge-only USB-C cable looks the same as a video cable but carries no picture.
Use the cable that came with the monitor, or one that states video or DisplayPort support. Then check the wattage: read the wattage on your laptop charger brick and compare it with the monitor USB-C wattage on the listing.
If the monitor supplies less, the laptop may charge slowly or lose charge under load.
HDMI is the safe fallback and the port most laptops already have. It carries video and sound and works with almost every monitor, but it does not charge the laptop, so the charger stays plugged in beside it.
DisplayPort is the other common wired option, found on docks and many desktop monitors, and it handles high resolutions well. Our guide to connecting a monitor to a PC walks through the physical connection step by step.
If the laptop has only one USB-C port and no HDMI, a USB-C hub with an HDMI port solves the gap: read our guide to the best USB-C hub for a laptop first, since a hub without video support will not drive a monitor at all.
Refresh rate and panel type in plain words
Refresh rate is how many times the screen redraws each second, measured in hertz. A 60Hz screen redraws 60 times a second, which is fine for documents, email, calls and video.
A 120Hz or 144Hz screen redraws faster, so scrolling and mouse movement look smoother, and games feel more responsive. For office work the gain is small, so spend on size and resolution first.
For gaming, refresh rate matters more than resolution: a fast 1440p screen beats a slow 4K screen for play. Our guide to the best refresh rate for a laptop explains the trade-off in more detail.
Panel type is the screen technology behind the picture, and three types cover almost every monitor. IPS panels keep colors steady when you look from the side, which suits shared desks and color work.
VA panels show deeper blacks, which suits films and dark rooms, but colors can shift at wide angles. TN panels are the fastest and often the cheapest, but colors change when you move your head. For work, study and calls, IPS is the easy default.
Check the stand too: a height-adjustable stand puts the top of the screen at eye level.
The 5 monitors at a glance
All five work with a laptop over HDMI or USB-C. Use this table to narrow the list, then read the full pick.
| Monitor | Size | Resolution | Connection | Best for | Check before buying |
|---|---|---|---|---|---|
| Dell UltraSharp U2723QE | 27 inch | 4K | USB-C, HDMI, DisplayPort | One all-round desk monitor | USB-C power delivery wattage |
| LG UltraFine 27UP850N-W | 27 inch | 4K | USB-C, HDMI, DisplayPort | Photo and video work | USB-C port on the laptop |
| Dell S2421HS | 24 inch | Full HD | HDMI, DisplayPort | A second screen on a budget | Desk depth for the stand |
| ASUS ZenScreen MB16ACV | 15.6 inch | Full HD | USB-C | Travel and small desks | USB-C video support on the laptop |
| Samsung Smart Monitor M8 | 32 inch | 4K | USB-C, HDMI | A screen that works on its own | Desk space for 32 inch |
Dell UltraSharp U2723QE: best all-round USB-C monitor
This is the monitor to buy when you want one screen that does the whole desk job. A 27 inch 4K panel gives room for two windows side by side, and the built-in USB-C hub carries the picture, charges the laptop and connects a keyboard and mouse through the monitor, and the height-adjustable stand puts the screen at eye level without a riser.
The one spec to check is the USB-C power delivery wattage on the listing. Compare it with the wattage printed on your laptop charger brick. If the monitor supplies less, the laptop may charge slowly under load, and you will still need the charger on heavy days. Skip this monitor if the desk is small or shallow: a 24 inch screen fits a tight desk better.
A 27 inch 4K screen with a USB-C hub that carries video and charges the laptop over one cable.
See options on AmazonLG UltraFine 27UP850N-W: best 4K monitor for creators
This monitor suits photo editing, video work and design, where fine detail and steady color matter most. A 27 inch 4K panel shows small text and fine edges clearly, and the USB-C port carries the picture while it charges the laptop.
The one spec to check is the laptop port. Confirm the USB-C port on your laptop supports video out, using the port marking or the laptop manual, since a data-only port will charge the laptop but show no picture. Skip this monitor if the work is mostly documents and calls: a 1440p screen costs less and shows text just as well at normal viewing distance.
A 27 inch 4K screen with USB-C that suits photo and video work where fine detail matters.
See options on AmazonDell S2421HS: best budget monitor
This monitor suits a first second screen, a student desk or a spare room. A 24 inch Full HD panel is sharp enough for documents, email and calls, and HDMI connects to almost every laptop made in the last ten years. The slim bezels and small stand keep it neat on a shallow desk.
The one spec to check is the connection. Confirm your laptop has an HDMI port, or plan for a USB-C to HDMI adapter or hub, since this monitor has no USB-C input. Skip this monitor if you edit photos or video for a living: Full HD is fine for documents but tight for timelines and fine detail.
A 24 inch Full HD screen with HDMI that gives a second screen for a small outlay.
See options on AmazonASUS ZenScreen MB16ACV: best portable monitor
This monitor suits anyone who works from more than one place: a second desk, a library table or a hotel room. A 15.6 inch Full HD screen runs from the laptop USB-C port, folds into a laptop bag with a cover that doubles as a stand, and gives the same two-screen layout on the road.
The one spec to check is USB-C video support on the laptop, since a portable monitor draws picture and power from that one port. Check the port marking or the manual for DisplayPort Alt Mode. Skip this monitor if it will live on one desk: a fixed 24 or 27 inch screen is bigger and cheaper per inch.
A slim 15.6 inch screen that runs from the laptop USB-C port and fits in a laptop bag.
See options on AmazonSamsung Smart Monitor M8: best monitor that works without a PC
This monitor suits a desk that doubles as a living space. A 32 inch 4K screen works as a laptop monitor over USB-C or HDMI, then runs streaming apps on its own when the laptop is away.
The one spec to check is desk space. A 32 inch screen needs a deep desk and a full arm’s length of viewing distance, or the corners sit too close to read comfortably. Skip this monitor if the desk is shallow or the work needs exact color: a 27 inch IPS screen fits a work desk better.
A 32 inch 4K screen that runs apps on its own, so it works as a display and a small TV.
See options on AmazonMistakes to avoid
1. Buying before checking the ports. A monitor with only USB-C is useless on a laptop with no video-capable USB-C port. Fix it by writing down the laptop ports and markings first, then filtering every monitor by that list.
2. Picking a USB-C monitor whose charging is too weak. A monitor that supplies less power than the charger will charge slowly or lose charge under load. Fix it by comparing the monitor USB-C wattage with the wattage on the charger brick.
3. Using a charge-only USB-C cable for video. The cable looks right and the laptop charges, but the screen stays black because the cable carries no video signal. Fix it by using the cable that came with the monitor, or one that states video or DisplayPort support.
4. Buying a size the desk cannot hold. A 32 inch screen on a shallow desk sits too close, and a 27 inch screen on a narrow desk leaves no room for the keyboard. Fix it by measuring the desk, then checking the stand footprint on the listing.
5. Leaving Windows on the wrong display mode. A new monitor that mirrors the laptop shows the same small picture twice.
Fix it by opening Settings > System > Display, selecting the new monitor, setting Display resolution to the option marked (Recommended), then choosing Extend under Multiple displays.
If the monitor still shows nothing, read our guide to an external monitor not working on a laptop before you return the screen.
Frequently asked questions
What size monitor is best for a laptop?
A 27 inch monitor suits most desks and most work, with room for two windows side by side. A 24 inch screen fits a small or shallow desk, and a 32 inch screen suits photo and video work on a deep desk. Measure first: you want about an arm’s length between your eyes and the screen.
Can I connect a monitor with one USB-C cable?
Yes, when three parts support it: a laptop USB-C port with video out, a cable rated for video, and a monitor with a USB-C input and power delivery. Check the port marking or the manual for DisplayPort Alt Mode, and compare the monitor wattage with your charger. If any part lacks video support, use HDMI instead.
Is a 4K monitor worth it for a laptop?
It depends on the work. A 4K monitor is worth it for photo editing, video work and design, where fine detail stays crisp. For documents, email and calls, a 1440p screen at 27 inch shows text just as well and costs less. Match the resolution to the work, not to the spec sheet.
Do I need a monitor with a higher refresh rate?
Not for office work. A 60Hz screen is fine for documents, email, calls and video, and a higher refresh rate adds cost without changing the work. A 120Hz or 144Hz screen is worth it for gaming and for choppy scrolling. Spend on size, resolution and the USB-C hub first.
Why is a monitor not detected by a laptop?
Start with the simple causes: a charge-only USB-C cable, a loose connector, or the wrong input selected on the monitor. Then open Settings, go to System, Display, Multiple displays, and select Detect. If Windows still sees nothing, try another cable and another port.
Bottom line: Check the laptop ports, then buy the screen that fits the desk and the work: Dell U2723QE for a one-cable office desk, LG 27UP850N-W for creators, Dell S2421HS for a first second screen, ASUS ZenScreen for travel, and Samsung M8 when the screen must work on its own. For more buying guides, see the Buying Guides hub.
Sources: Microsoft Support, Change your screen resolution and layout in Windows; Microsoft Support, How to use multiple monitors in Windows; VESA, DisplayPort Alt Mode on USB Type-C. Photos: Kampus Production, Tranmautritam, cottonbro studio, Lee Campbell, Sharad Kachhi and Tunde TNT via Pexels. Diagram: ictservicecenter.com.