Yes, you can use a laptop as a monitor for another computer. This setup gives you an extra screen without buying new hardware. It’s a clever way to get more desktop space.
I’ve tried this trick many times myself. It works great when you need a second screen fast. You might have an old laptop sitting in a drawer. That laptop can become a useful monitor for your main PC.
This guide will show you how to do it. We’ll look at the easy ways and the hard ways. I’ll also tell you when it’s not worth the trouble.
Let’s get into the details. I’ll walk you through every step you need to know.
Can You Use a Laptop as Monitor? The Direct Answer
So, can you use a laptop as monitor? The short answer is yes. But it’s not as simple as plugging in a cable. You need the right software or hardware to make it work.
Your laptop’s video port is usually for output only. That means it sends a signal out to another screen. It doesn’t take a signal in from another computer. This is the main problem you face.
You have to work around this limitation. Software solutions are the most common way. They let your laptop’s screen show another computer’s desktop over a network.
Some people think you can use an HDMI cable. That almost never works for this job. The laptop’s HDMI port is made for sending video, not receiving it.
I’ve tested all the main methods. Some work better than others. Your success depends on your laptop’s age and your operating system.
Let’s break down how each method works. I’ll tell you which one I use most often.
Why You Might Want a Laptop as a Second Screen
Having two screens is a game changer. It makes you more productive. You can have your main work on one screen and reference material on the other.
Maybe you’re working from home on a tight budget. Buying a new monitor costs money. Using an old laptop as a monitor saves you that cash.
It’s also great for travel. You might bring your gaming PC to a friend’s house. Using their laptop as a monitor means you don’t need to bring a screen too.
Students find this trick useful. Dorm rooms are small. An extra monitor takes up desk space. A laptop as a monitor can sit on a bookshelf instead.
I use my old laptop as a monitor for my media server. It shows me what’s playing without turning on the TV. It’s a handy setup for my living room.
The uses are endless once you know how. It turns old tech into something useful again.
Software Solutions: The Easiest Way to Connect
Software is your best friend for this task. Programs like SpaceDesk or Duet Display make it simple. They create a virtual display over your home network.
You install a small program on both computers. The main PC acts as the server. The laptop acts as the client that shows the extra screen.
The connection happens through Wi-Fi or a wired network. There’s almost no lag for basic office work. You might notice some delay if you try to play games this way.
I use SpaceDesk because it’s free. It works with Windows PCs and even some Android devices. The setup takes about ten minutes from start to finish.
Just make sure both computers are on the same network. The software will find them automatically. Then you drag windows to your new laptop screen.
It feels like magic the first time you do it. Your laptop becomes a real extension of your desktop.
Windows Built-In Feature: Projecting to This PC
Windows 10 and 11 have a hidden trick. It’s called “Projecting to this PC.” This feature lets you use a laptop as monitor wirelessly.
You can find it in the Settings app. Go to System, then Display, and look for the projection settings. Turn on the option that says “Available everywhere” or “Always on.”
On your main PC, press Windows Key + P. Choose “Connect to a wireless display.” Your laptop should show up in the list if everything is set right.
This method works okay for basic tasks. I find it can be a bit slow sometimes. The image might stutter if your Wi-Fi is busy.
It’s perfect for showing a presentation or a document. I wouldn’t use it for video editing or fast-paced games. The delay is too noticeable for those jobs.
Still, it’s built right into Windows. That means no extra software to download. It’s worth trying before you install anything else.
Using a Capture Card: The Hardware Method
Here’s a hardware way to use a laptop as monitor. You need a USB capture card. This little device takes a video signal and sends it to your laptop over USB.
Connect your main PC’s HDMI output to the capture card. Then plug the capture card into your laptop’s USB port. The laptop sees the card as a webcam or video source.
Use software like OBS Studio to view the signal. OBS is free and works on Windows, Mac, and Linux. It shows your main PC’s screen in a window on your laptop.
This method adds some lag too. It’s better for static images than moving video. Gamers might not like the delay they see.
Capture cards cost between $20 and $100. The cheap ones work fine for this job. You don’t need a fancy 4K model just to show a desktop.
I keep a cheap capture card in my tech bag. It’s saved me a few times when I needed an extra screen on the go.
Mac Users: Can You Use a MacBook as a Monitor?
Apple made this easy with Target Display Mode. But they took it away on newer models. Older MacBooks from 2011 to 2014 had this great feature.
If you have an older MacBook, you’re in luck. Press Command + F2 to turn it into a monitor. It works with another Mac through a Thunderbolt cable.
New MacBooks don’t have Target Display Mode. You need software like Luna Display or Duet. These apps work similar to the Windows solutions I mentioned.
Luna Display uses a small hardware dongle. It plugs into your main Mac’s USB-C port. Then your MacBook becomes a wireless monitor with very little lag.
According to Apple’s support site, they removed the feature to make laptops thinner. I think that was a bad choice for users.
So can you use a laptop as monitor if it’s a MacBook? Yes, but you need extra gear for newer models.
Gaming with a Laptop as Monitor: Is It Good?
Gamers ask me this question a lot. Can you use a laptop as monitor for gaming? The answer is maybe, but don’t expect great results.
Software solutions add too much delay for fast games. You’ll notice the lag in first-person shooters or racing games. It makes aiming or steering feel slow and floaty.
A capture card is slightly better for this. But it still adds some processing time. The game might feel a bit off even with a good card.
Turn-based games work fine though. I’ve played strategy games on a laptop monitor setup. The slow pace means the lag doesn’t matter much.
The Bureau of Labor Statistics says many people work and play on computers. Using what you have makes sense for casual gaming.
For serious gaming, buy a real monitor. The response time and refresh rate are much better. Your scores will thank you for it.
Step-by-Step Guide Using Free Software
Let me walk you through my favorite method. We’ll use SpaceDesk since it’s free and works well. First, download the driver on your main PC from their website.
Install it and restart your computer. Then download the viewer software on your laptop. Install that too – it’s a much smaller program.
Make sure both computers are on the same Wi-Fi network. Open SpaceDesk on your laptop. It should show your main PC’s name in the list.
Click connect on the laptop. Your main PC will now have an extra display. You can arrange it in your display settings just like a real monitor.
Drag a window from your main screen to the laptop screen. It should appear there instantly. You now have a working dual monitor setup.
This is how I use a laptop as monitor for my home office. It took me 15 minutes to set up the first time. Now it connects automatically when I turn on both machines.
Common Problems and How to Fix Them
Sometimes the connection doesn’t work right away. The most common issue is firewall settings. Your firewall might block the network connection between computers.
Try turning off the firewall temporarily to test. If it works, add an exception for the software. This lets it through while keeping other protection active.
Another problem is slow Wi-Fi. The video stream needs good bandwidth. Move closer to your router or use a wired connection if possible.
Screen resolution might look wrong on the laptop. Go to display settings on your main PC. Set the laptop screen to its native resolution for the sharpest image.
The FCC website has tips for improving home Wi-Fi. Better signal means better performance for your laptop monitor setup.
If nothing works, restart both computers. I know it sounds simple, but it fixes many connection issues. Then try the setup process again from the beginning.
When You Shouldn’t Use a Laptop as Monitor
This trick isn’t perfect for every situation. Don’t use it for color-critical work like photo editing. Laptop screens often show colors differently than desktop monitors.
The brightness and contrast might not match your main screen. This makes editing photos or videos very hard. You’ll get inconsistent results.
Also skip this method if you need perfect security. Network-based solutions could be intercepted. Use a direct cable connection for sensitive work.
Battery life is another concern. Using your laptop as a monitor drains its battery fast. Keep it plugged in during long work sessions.
According to Energy.gov, laptops use less power than desktop monitors. But running both computers still uses more electricity than one computer with one monitor.
Think about your needs before you start. Sometimes buying a cheap used monitor is the better choice.
Comparing Methods: Which One Should You Choose?
Let’s compare your main options. Software solutions are the easiest and cheapest. They work well for office tasks and web browsing.
Windows built-in projection is convenient but limited. It’s best for temporary setups or showing things to other people.
Capture cards cost money but work with any video source. You can even use them with game consoles or cameras. They’re more versatile than software-only methods.
I recommend starting with free software like SpaceDesk. It gives you a good feel for how the setup works. If you like it, you can try other methods later.
Your choice depends on what computers you have. It also depends on what you want to do with the extra screen.
Can you use a laptop as monitor effectively? Yes, with the right method for your specific needs.
Frequently Asked Questions
Can you use a laptop as monitor with an HDMI cable?
No, this almost never works. Laptop HDMI ports are output only. They can’t receive a video signal from another device.
Can you use a laptop as monitor for a gaming console?
Yes, with a capture card. Connect the console to the card, then the card to your laptop. Use software to view the video feed.
Can you use a laptop as monitor without Wi-Fi?
Yes, use an Ethernet cable to connect both computers. Some software works over a direct network connection without internet.
Can you use a laptop as monitor for a desktop PC?
Yes, this is the most common use. Your desktop gains an extra screen using your laptop’s display.
Can you use a laptop as monitor for security cameras?
Yes, if your security system has software for Windows or Mac. Install it on the laptop and use it to view camera feeds.
Can you use a laptop as monitor for a Raspberry Pi?
Yes, and it works great. The Pi’s low power pairs well with a laptop screen. Use software or a capture card to connect them.
Conclusion
So, can you use a laptop as monitor? Absolutely yes. It takes a little work, but the results are worth it for many people.
Start with free software to test the idea. See if having an extra screen helps your workflow. You might find you love the extra space.
Remember the limitations though. Don’t expect perfect performance for gaming or color work. But for everyday tasks, it’s a fantastic trick.
That old laptop in your closet has new life now. Turn it into a second monitor instead of letting it collect dust. Your productivity will thank you for it.