The basic steps to cast from your laptop
To cast your laptop to a Chromecast device, open Chrome on your computer, click the three-dot menu in the top right corner, select Cast, choose your Chromecast device from the list, and then select what you want to send — your entire screen, a single tab, or just audio. Your laptop screen will then appear on the TV or display connected to your Chromecast within a few seconds.
The device must be on the same Wi-Fi network as your laptop for casting to work. If your Chromecast doesn't appear in the Cast menu, check that both devices are connected to the same network and that your Chromecast is powered on and set up.
Casting uses your Wi-Fi connection, not a cable, so you can move around your room while casting. The connection stays active as long as your laptop remains on the same network and within range.
Key Takeaways
- Open Chrome, click the three-dot menu, select Cast, and choose your Chromecast device to begin sending your screen to the TV.
- You can cast your entire screen, a single browser tab, or audio only — choose the option that matches what you want to display.
- Both your laptop and Chromecast must be connected to the same Wi-Fi network for casting to work.
- If your Chromecast doesn't show up in the Cast menu, restart both devices and confirm they are on the same network.
Casting your entire screen versus a single tab
When you click Cast and select your device, Chrome asks you to choose what to send. Cast tab sends only the active browser tab to your TV — useful when you want to show a presentation, video, or website without displaying your desktop, notifications, or other open windows. Cast entire screen sends everything on your laptop display, including your desktop background, taskbar, and any windows you have open.
Most people use Cast tab for presentations, videos, or web content because it keeps your personal files and other browser tabs hidden. Cast entire screen is better when you need to show files on your desktop, use multiple applications, or demonstrate something that isn't in a browser.
You can switch between tab and screen casting without disconnecting — just click the Cast button again and select a different option. The change takes effect when ready.
What to do if your Chromecast doesn't appear
If your Chromecast device isn't showing up in the Cast menu, the most common cause is that your laptop and Chromecast are on different Wi-Fi networks. Check that both devices are connected to the same network name (SSID). Look at your laptop's Wi-Fi settings and compare the network name to the one your Chromecast is using — you can find this in the Google Home app on your phone or in your Chromecast's settings.
If both devices are on the same network, restart your Chromecast by unplugging it for 10 seconds and plugging it back in. While it restarts, close and reopen Chrome on your laptop. Once your Chromecast finishes restarting (the light will stop blinking), try the Cast menu again.
If the device still doesn't appear, restart your Wi-Fi router by unplugging it for 30 seconds. Some routers separate devices onto different bands (2.4 GHz and 5 GHz), and older Chromecast models only work on 2.4 GHz. Check your router settings to see if you can connect both devices to the same band.
Controlling playback and adjusting volume
Once you're casting, a small Cast icon appears in your Chrome menu bar. Click it to open the casting controls — you can pause, play, stop, or adjust the volume without touching the TV remote. The volume control on your laptop also adjusts the Chromecast volume while you're casting.
If you're casting a video or audio, you can use the standard browser controls (play, pause, seek) on your laptop, and the changes appear on your TV in real time. If you're casting your entire screen, you control everything from your laptop as normal — your mouse and keyboard work exactly as they would without casting.
To stop casting, click the Cast icon in the Chrome menu and select Stop casting. Your TV will return to whatever it was displaying before you started casting, and your laptop screen will no longer be sent to the device.
Using Chromecast with different types of content
Casting works differently depending on what you're sending. When you cast a YouTube video, Netflix show, or other streaming service, the content plays directly on your Chromecast — your laptop doesn't have to stay on or connected to the network. The Chromecast connects to the service itself and streams the content, so you save battery and can even close your laptop.
When you cast a browser tab or your entire screen, your laptop must stay on and connected to Wi-Fi. The laptop sends the display to your Chromecast continuously, so closing your laptop or disconnecting from Wi-Fi will stop the casting. This is why casting a tab uses more battery than casting a video from a streaming service.
Some websites and applications don't support casting, even if you're casting the tab. If a site blocks casting, you can still cast your entire screen instead, though this uses more bandwidth and battery.
Troubleshooting lag and connection drops
If your casting is choppy, freezes, or drops frequently, the issue is usually Wi-Fi signal strength or interference. Move your laptop closer to your Wi-Fi router or Chromecast device. If you're far from the router, the signal may be too weak to handle both your laptop and the Chromecast at the same time.
Other devices using your Wi-Fi — like phones, tablets, or smart home devices — can also cause lag. If casting is slow, try disconnecting other devices temporarily to see if performance improves. Microwaves and cordless phones can interfere with Wi-Fi on the 2.4 GHz band, so move your router away from these devices if possible.
If the connection keeps dropping, restart your router and Chromecast. If the problem continues, check whether your router's firmware is up to date — outdated firmware can cause connection instability. You can usually update your router through its settings app or web interface.
Casting from Windows versus Mac
The casting process is identical on Windows and Mac laptops — both use the same Chrome Cast menu. The only difference is where the three-dot menu appears: on Windows it's in the top right corner of the Chrome window, and on Mac it's also in the top right but may look slightly different depending on your macOS version.
Both Windows and Mac laptops can cast their entire screen, a single tab, or audio only. Performance and reliability are the same on both systems, so your experience casting from a Windows laptop will be the same as casting from a Mac.
If you're using a different browser like Firefox, Safari, or Edge, those browsers do not have built-in Chromecast support. You must use Chrome to cast from your laptop.
Frequently Asked Questions
Can I cast from my laptop while someone else is casting from their phone?
No, only one device can cast to a Chromecast at a time. If someone is already casting from a phone or tablet, your laptop won't appear in the Cast menu. The other person must stop casting first. Once they disconnect, your Chromecast will be available again.
Does my laptop have to stay on while I'm casting a movie?
It depends on what you're casting. If you're casting a video from Netflix, YouTube, or another streaming service, your laptop can go to sleep or even shut down — the Chromecast streams directly from the internet. If you're casting a browser tab or your entire screen, your laptop must stay on and connected to Wi-Fi, or the casting will stop.
Why is my Chromecast casting in low quality?
Casting quality depends on your Wi-Fi signal strength and bandwidth. If your Wi-Fi is slow or congested, Chrome automatically reduces the quality to keep the connection stable. Move closer to your router, disconnect other devices from Wi-Fi, or restart your router. If you're casting a video from a streaming service, you can also check the video quality settings in that app.
Can I cast audio only without showing my screen?
Yes, when you open the Cast menu, you can select Cast audio to send only sound to your Chromecast speakers without displaying anything on your TV. This is useful for playing music or podcasts through your TV's speakers while keeping your laptop screen private.
What if I want to cast from a different browser?
Chromecast casting is only built into Chrome. Firefox, Safari, Edge, and other browsers don't have native Chromecast support. If you need to cast from a different browser, you can open the same content in Chrome instead, or cast your entire screen to show the other browser's window.