How to Cast from Your Laptop to Chromecast

To cast your laptop screen to a Chromecast device, open Chrome on your computer, click the three-dot menu in the top right, select Cast, choose your Chromecast device from the list, and then select whether you want to cast your entire screen or just a single tab. Your laptop screen will appear on the TV within a few seconds. The process works the same way on Windows, Mac, and Linux computers.

You need three things in place before you start: Chrome browser installed on your laptop, a Chromecast device plugged into your TV and connected to the same Wi-Fi network as your computer, and the TV turned on. If your Chromecast is not showing up in the Cast menu, the most common reason is that your laptop and Chromecast are on different Wi-Fi networks—check that both are connected to the same network name.

Key Takeaways

  • Click the three-dot menu in Chrome, select Cast, pick your device, and choose between casting your full screen or a single tab.
  • Your laptop and Chromecast must be on the same Wi-Fi network for casting to work.
  • Casting a single tab uses less bandwidth and battery than casting your entire screen.
  • You can stop casting by clicking the Cast icon again and selecting Stop Casting, or by closing the Cast menu.
  • Audio from your laptop will play through your TV speakers once casting begins.

Step-by-Step: Casting Your Full Screen

Open Chrome and look for the three vertical dots in the top right corner of the browser window. Click on them to open the menu. Scroll down until you see the word Cast and click it. A small window will pop up showing all available Chromecast devices on your network.

Find your Chromecast device in the list—it will have a name like "Living Room" or "Bedroom TV" depending on what you named it during setup. Click on the device name. A second menu will appear asking whether you want to cast your Entire screen or a Tab. Select Entire screen to mirror everything on your laptop display.

Your screen will appear on the TV within two to five seconds. You will see a small blue Cast icon appear in the top right of your Chrome menu bar, showing that casting is active. Your mouse and keyboard still control your laptop—everything you do on your computer will show on the TV in real time.

Casting a Single Tab Instead of Your Whole Screen

Casting a single tab is useful when you want to share one website or video while keeping other browser windows private. Follow the same first steps: open the three-dot menu, click Cast, and select your Chromecast device. This time, when the menu asks whether you want to cast your entire screen or a tab, select Tab.

Only the active tab will appear on your TV. You can switch to other tabs or open new windows on your laptop without anything changing on the TV screen. This method also uses less battery power and less Wi-Fi bandwidth than casting your entire screen, which matters if your network is slow or your laptop battery is low.

If you switch back to casting your entire screen later, just click the Cast icon again, select your device, and choose Entire screen. You do not need to disconnect and reconnect—Chrome will switch the casting mode when ready.

Stopping the Cast and Disconnecting

To stop casting, click the blue Cast icon in the top right of your Chrome menu bar. A small menu will appear showing your connected device. Click Stop Casting at the bottom of that menu. Your laptop screen will no longer appear on the TV, and the Cast icon will disappear from your browser.

Alternatively, you can click the three-dot menu, select Cast again, and then click the X next to your device name. Both methods disconnect your laptop from the Chromecast when ready. The TV will return to whatever it was showing before you started casting.

Troubleshooting: Device Not Appearing in the Cast List

The most common reason your Chromecast does not show up is that your laptop and the device are on different Wi-Fi networks. Check the Wi-Fi network name your laptop is connected to by clicking the Wi-Fi icon in your system tray (Windows) or menu bar (Mac). Then check what network your Chromecast is on by opening the Google Home app on your phone or tablet, tapping the Chromecast device, and looking at the network name in the settings.

If they do not match, connect your laptop to the same network as your Chromecast. Once both are on the same network, wait 10 to 15 seconds and open the Cast menu again—your device should now appear in the list.

If your Chromecast is still not showing up, restart both devices. Unplug your Chromecast from the TV for 30 seconds, plug it back in, and wait for it to fully boot (the light will stop blinking). Then restart your laptop. Open Chrome and try casting again.

Audio and Video Quality During Casting

When you cast from your laptop, both video and audio play through your TV and its speakers. Your laptop speakers will be silent. If your TV volume is too low, adjust it using your TV remote, not your laptop volume controls—the laptop volume slider will not affect what comes out of the TV.

Video quality depends on your Wi-Fi connection speed. If your network is slow, the image on the TV may lag behind what you see on your laptop, or the picture may become blurry. Moving your laptop closer to your Wi-Fi router or moving your Chromecast closer to the router can improve the connection. If you are casting video or playing games, a strong Wi-Fi signal makes a noticeable difference.

Casting While Your Laptop Is Asleep or Locked

If you close your laptop lid or lock the screen while casting, the cast will stop. Your laptop must stay awake and unlocked for casting to continue. If you want to cast a video or presentation and then step away, keep your laptop plugged in and set it to never sleep while plugged in. On Windows, go to Settings > System > Power & sleep and change the "Screen turns off after" setting to Never. On Mac, go to System Preferences > Energy Saver and drag the "Turn display off after" slider all the way to the right.

Alternatively, if you are casting a video from a website like YouTube, you can use YouTube's built-in Cast button instead of Chrome's Cast feature. This method allows your laptop to sleep while the video continues playing on your TV.

Frequently Asked Questions

Do I need to be on the same Wi-Fi network to cast?

Yes. Your laptop and Chromecast must both be connected to the same Wi-Fi network. They do not need to be on a guest network or a work network—just the same network name. If they are on different networks, your Chromecast will not appear in the Cast menu.

Can I cast from a Chromebook the same way?

Yes, the steps are identical on a Chromebook. Open Chrome, click the three-dot menu, select Cast, choose your device, and pick whether to cast your screen or a tab. Chromebooks work with Chromecast the same way laptops do.

What if I want to cast from Firefox or Safari instead of Chrome?

Chrome's Cast feature is built into the Chrome browser only. Firefox and Safari do not have a built-in Cast button. However, some websites like YouTube and Netflix have their own Cast buttons that work in any browser. Look for a Cast icon (usually a rectangle with a Wi-Fi symbol) on the video player itself.

Can multiple people cast to the same Chromecast at the same time?

No. Only one device can cast to a Chromecast at a time. If someone else tries to cast while you are already casting, their device will take over and your cast will stop. You will see a notification on your laptop that the cast has been interrupted.

Does casting drain my laptop battery faster?

Yes, casting uses more battery power than normal laptop use because your Wi-Fi radio is working harder and your screen stays on. Casting a single tab uses less battery than casting your entire screen. Plugging your laptop in while casting is the best option if you plan to cast for more than an hour.