The Basic Steps to Cast from Your Computer

To cast from your PC to a TV with Chromecast, 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 pick whether you want to cast your entire screen or just a single tab. Your TV will display what you selected within a few seconds. The connection stays active until you stop the cast or close the browser.

Your PC and Chromecast device must be on the same Wi-Fi network for this to work. If your Chromecast does not appear in the Cast menu, restart both your router and the Chromecast device, then try again. The cast will continue even if you minimize Chrome, but closing the browser will end it.

Key Takeaways

  • You need Google Chrome installed on your PC and a Chromecast device plugged into your TV, both connected to the same Wi-Fi network.
  • Casting your entire screen shows everything on your monitor, while casting a single tab shows only that browser window and uses less bandwidth.
  • The three-dot menu in Chrome's top right corner is where you find the Cast option — it is not in Settings.
  • If your Chromecast does not appear in the Cast list, restart your router and Chromecast device, then refresh Chrome.
  • Audio plays through your TV speakers once you start casting, so adjust your TV volume rather than your computer volume.

Setting Up Your Network Before You Cast

Both your PC and your Chromecast device must connect to the same Wi-Fi network. Check your Chromecast by looking at the light on the device itself — a solid white or blue light means it is connected. If the light is red or blinking, the Chromecast has not connected to Wi-Fi yet.

To connect your Chromecast to Wi-Fi for the first time, use the Google Home app on your phone or tablet. Open the app, tap the plus icon to add a device, select Set up device, choose New device, and follow the prompts to connect it to your Wi-Fi network. Once your Chromecast is on the same network as your PC, you are ready to cast.

If you are on a work or school network that requires a login page, Chromecast may not connect. Some networks block the device entirely. Check with your network administrator if you cannot get your Chromecast to appear on the network list.

Casting Your Entire Screen vs. a Single Tab

Casting your entire screen shows everything on your monitor — your desktop, all open windows, and any notifications. This is useful when you want to show multiple things or control what appears on the TV from your keyboard and mouse. The downside is that it uses more bandwidth and can slow down your PC if you are on a weak Wi-Fi connection.

Casting a single tab shows only the content inside that one Chrome tab. This is the better choice for streaming video, presenting a website, or sharing a document. It uses less bandwidth and keeps your other open windows private — your audience sees only what is in that tab.

To switch between the two, open the Cast menu again and select either Cast screen or the name of the specific tab you want to cast. You can change which tab you are casting without stopping and restarting the connection.

Troubleshooting When Your Chromecast Does Not Appear

If you open the Cast menu and your Chromecast device is not listed, the most common cause is that your PC and Chromecast are not on the same Wi-Fi network. Check that both devices are connected to the same network name — if your router broadcasts both a 2.4 GHz and 5 GHz band, make sure both devices are on the same one.

Restart your Chromecast by unplugging it from power for 10 seconds, then plugging it back in. While it restarts, also restart your Wi-Fi router by unplugging it for 10 seconds. Once both devices have restarted, refresh Chrome and check the Cast menu again.

If your Chromecast still does not appear, open the Google Home app on your phone and check whether the Chromecast is showing as connected there. If it is not connected in the Home app, your Chromecast has lost its Wi-Fi connection and needs to be set up again. If it is connected in the Home app but not showing in Chrome, restart your PC and try again.

Controlling Playback and Adjusting Volume

Once you start casting, a small cast icon appears in the Chrome address bar. Click it to open the cast controls — you can pause, play, or stop the cast from there. The controls work the same whether you are casting your entire screen or a single tab.

Audio plays through your TV speakers, not your computer speakers. Adjust the volume using your TV remote or your TV's volume buttons — changing the volume on your PC will not affect what comes out of the TV. If you want to hear the audio on both your TV and your computer, you will need to use your computer's speakers separately, which most people do not do while casting.

If the video or audio is choppy or keeps stopping, move your PC closer to your router or Chromecast device. Walls, microwaves, and other wireless devices can interfere with the Wi-Fi signal. Casting a single tab instead of your entire screen can also improve performance.

Casting From Different Browsers and Applications

Google Chrome is the easiest way to cast from a PC because the Cast feature is built in. However, some other applications also support casting. If you are using Microsoft Edge, you can cast the same way — open the three-dot menu and select Cast media to device. The steps are nearly identical to Chrome.

Many streaming services like Netflix, YouTube, and Spotify have their own cast buttons inside the app. Look for a cast icon (usually a rectangle with a Wi-Fi symbol in the corner) and tap it to send video or music directly to your Chromecast. This method often works better than casting a tab because the streaming service handles the connection directly.

Firefox and Safari do not have built-in cast features. If you use those browsers, you will need to cast a Chrome tab instead, or use a streaming app that has its own cast button.

Common Mistakes That Stop Casting From Working

The most common mistake is forgetting that your PC and Chromecast must be on the same Wi-Fi network. If you recently changed your Wi-Fi password or switched networks, your Chromecast may still be connected to the old network. Use the Google Home app to check which network your Chromecast is on and reconnect it if needed.

Another frequent problem is closing Chrome while casting. If you close the browser window, the cast stops when ready. Keep Chrome open in the background while you are casting, even if you minimize it.

Some people try to cast from Internet Explorer or an older version of Chrome. Make sure you are using a recent version of Google Chrome — open Chrome, click the three-dot menu, go to Help, and select About Google Chrome. Chrome will update automatically if a newer version is available.

Frequently Asked Questions

Do I need a Google account to cast from my PC?

You do not need a Google account on your PC to cast. However, your Chromecast device itself must be set up with a Google account through the Google Home app. Once it is set up, anyone on the same Wi-Fi network can cast to it from their PC without signing in.

Can I cast if my PC is on a different Wi-Fi network than my TV?

No. Your PC and Chromecast must be on the same Wi-Fi network. If your PC is on a guest network and your Chromecast is on your main network, they cannot see each other. Connect both devices to the same network name.

What happens to my PC when I start casting?

Your PC continues to work normally. If you are casting your entire screen, anything you do on your computer will show on the TV. If you are casting a single tab, only that tab displays on the TV — you can use other tabs or applications on your PC without affecting what the TV shows.

Can I cast to multiple TVs at the same time?

No. One PC can only cast to one Chromecast device at a time. If you want to cast to a different TV, stop the current cast and select a different device from the Cast menu.

Why is the video on my TV lagging behind what I see on my PC?

A slight delay of one to two seconds is normal when casting. If the delay is longer, your Wi-Fi connection is weak. Move your PC or router closer to your Chromecast, or cast a single tab instead of your entire screen to reduce the load on your network.