The Basic Steps to Cast from Windows or Mac

To cast your PC to your TV with Chromecast, you need three things: a Chromecast device plugged into your TV, your PC and TV on the same Wi-Fi network, and the Chrome browser open on your computer. The actual casting happens in about 30 seconds once you click the right button.

Open Chrome on your PC, then click the three vertical dots in the top right corner. Select "Cast" from the menu. A small window will pop up showing available Chromecast devices on your network—click the one connected to your TV. Your screen will now mirror to the television. To stop casting, click "Stop" in that same window or close it entirely.

If you don't see your Chromecast listed, make sure both your PC and the device are connected to the same Wi-Fi network. Restart your Chromecast by unplugging it for 10 seconds, then plug it back in and try again. If it still doesn't appear, restart Chrome completely.

Key Takeaways

  • Your PC, Chromecast device, and TV must all be on the same Wi-Fi network for casting to work.
  • The Cast button lives in Chrome's menu (three dots, top right)—it is not available in other browsers.
  • Casting your entire screen shows everything on your PC, including notifications and password fields, so be aware of what's visible.
  • If your Chromecast doesn't appear in the Cast menu, restart both the device and Chrome before troubleshooting further.

Casting a Single Tab Instead of Your Whole Screen

If you want to send only one browser tab to your TV instead of mirroring your entire screen, Chrome gives you that option. Click the three dots, select "Cast," then look for "Cast tab" instead of "Cast desktop" in the popup window. This is useful when you're watching a video or presentation and don't want your other open tabs, notifications, or taskbar visible on the TV.

Tab casting uses less bandwidth than full-screen mirroring and keeps your other work private. The audio from that tab will play through your TV speakers. If you switch to a different tab on your PC, the TV will go blank—only the selected tab streams to the television.

What to Do When Your PC Isn't Showing Up

The most common reason Chromecast doesn't find your PC is a network mismatch. Check that your computer is connected to the exact same Wi-Fi network as your Chromecast. Look at your Wi-Fi name in your system tray (bottom right on Windows, top right on Mac) and compare it to the network name shown in your Chromecast's settings on the TV.

If the networks match but casting still won't work, restart your router by unplugging it for 30 seconds. Then unplug your Chromecast for 10 seconds and plug it back in. Close Chrome completely and reopen it. These three restarts solve most connection problems.

If you're using a guest Wi-Fi network or a network that requires a login page (common in offices and hotels), Chromecast may not connect. Try switching your PC to the main network if one is available, or contact your network administrator about Chromecast compatibility.

Controlling Playback and Volume from Your PC

Once you're casting, the Cast window on your PC becomes a remote control. You can pause and play video, adjust volume, and skip forward or backward—all from your computer without touching the TV remote. The volume slider in the Cast window controls your TV's speaker volume, not your PC's.

If you're casting a YouTube video or other streaming content, the playback controls in the browser work the same way they normally do. Pause the video on your PC, and it pauses on the TV. The experience is seamless because the Chromecast is actually playing the content, not just displaying a mirror of your screen.

Why Your Screen Might Look Blurry or Lag

Screen mirroring from a PC to Chromecast works best on a strong, uncongested Wi-Fi network. If your connection is slow or many devices are using the network, you may see lag (a delay between what you do on your PC and what appears on the TV) or blurriness, especially with fast-moving content like games or videos.

To improve performance, move your PC closer to your router or Chromecast if possible. If other devices are streaming or downloading, pause them temporarily. Casting a single tab instead of your whole screen also reduces lag because it sends less data. If you're trying to play a game or watch high-motion video, full-screen mirroring may not be smooth enough—in that case, casting just the video tab is a better choice.

Casting Audio Only Without Showing Your Screen

Chromecast can play audio through your TV speakers without displaying anything on the screen. This works with music streaming apps like Spotify, YouTube Music, or Pandora. Open the app in Chrome, click Cast, and select your Chromecast device. The app will send audio to your TV while your PC screen stays dark or shows only the app window.

This is useful when you want to play music throughout your home without keeping your PC awake or displaying anything on the television. The audio quality depends on your TV's speakers and your Wi-Fi connection—a stable network gives you uninterrupted playback.

Stopping the Cast and Disconnecting

To stop casting, click the Cast button in Chrome again and select "Stop casting" from the popup, or straightforward close the Cast window. Your TV will go back to whatever it was showing before (usually the Chromecast home screen). Your PC screen will return to normal, and nothing will be sent to the television anymore.

If you want to cast again when ready, just click Cast and select your device. There's no need to restart anything—the connection is ready as soon as you click. If you're done using Chromecast for the day, you can leave it plugged in; it doesn't use much power when idle.

Frequently Asked Questions

Can I cast from a Mac the same way as Windows?

Yes. The steps are identical—open Chrome, click the three dots, select Cast, and choose your Chromecast device. Mac and Windows both use the same Chrome casting feature, so the process works the same way on either computer.

What if I want to cast from a different browser like Firefox or Edge?

Chromecast casting from a PC only works in Chrome. Firefox, Edge, and other browsers don't have the built-in Cast feature. You can still watch videos from other browsers on your TV by casting the entire Chrome tab if you open the video in Chrome instead, or by using other casting methods your TV may support.

Does casting drain my PC battery faster?

Yes, casting uses more power than normal browsing because your PC is sending video and audio over Wi-Fi continuously. If you're on a laptop, expect your battery to drain faster. Plugging in your laptop while casting is a good idea for longer sessions.

Can I cast while my PC is locked or asleep?

No. Your PC must be awake and unlocked for casting to work. If your screen goes to sleep, the cast will stop. Keep your PC active by adjusting your sleep settings or moving your mouse occasionally while casting.

Why does my Chromecast keep disconnecting?

Disconnections usually happen when your Wi-Fi signal is weak or unstable. Move your router or Chromecast closer together, or reduce the number of devices using the network. If disconnections happen frequently, restart your router and Chromecast, then try casting again.