Screen sharing with Chromecast works differently depending on what device you're using

To share your screen with Chromecast, you cast from your phone, tablet, or computer to a Chromecast device connected to your TV. The exact steps depend on whether you're using Android, iOS, Windows, or Mac. In every case, your casting device and your Chromecast must be on the same Wi-Fi network, and the Chromecast must already be set up and working.

Screen sharing is different from casting an app or video — you're sending everything on your screen, not just one program. This is useful when you want to show someone photos, browse the web together, or display a presentation from your laptop.

Key Takeaways

  • Your casting device and Chromecast must be connected to the same Wi-Fi network before you can share your screen.
  • Android phones and tablets use the Quick Settings menu to find the Cast option, while Windows and Mac computers use the Chrome browser's cast feature.
  • iOS devices can only mirror their screen through AirPlay, not through Chromecast, unless you use a third-party app.
  • Once you start casting, your screen appears on the TV within a few seconds, and you can continue using your device normally.
  • To stop screen sharing, open the cast menu on your device and select the option to disconnect or stop casting.

How to cast your screen from an Android phone or tablet

Open the Quick Settings panel by swiping down from the top of your screen twice. Look for an option called Cast, Screen Cast, or Wireless Display — the exact name varies by manufacturer and Android version. Tap it.

Your device will search for available Chromecast devices on your network. When you see your Chromecast listed, tap its name. Your screen will appear on the TV within a few seconds. The connection stays active as long as your phone or tablet remains on the same Wi-Fi network.

To stop casting, open Quick Settings again, tap the cast option, and select Stop casting or Disconnect.

How to cast your screen from a Windows computer

Open Google Chrome and click the three-dot menu in the top right corner. Select Cast from the dropdown menu. A small window will open showing available Chromecast devices.

Click on your Chromecast device name. A second menu will appear asking whether you want to cast a tab or your entire screen. Select Cast entire screen to share everything on your monitor. Your screen will appear on the TV within a few seconds.

To stop casting, click the cast icon again and select Stop casting.

How to cast your screen from a Mac computer

Open Google Chrome and click the three-dot menu in the top right corner. Select Cast. A window will show available Chromecast devices on your network.

Click your Chromecast device name. A menu will ask whether you want to cast a tab or your entire screen. Choose Cast entire screen. Your Mac screen will appear on the TV in a few seconds.

To disconnect, click the cast icon and select Stop casting.

What to do if your device doesn't find your Chromecast

The most common reason a device can't find Chromecast is that they're not on the same Wi-Fi network. Check that your phone, tablet, or computer is connected to the same network your Chromecast is using. You can find this in your Chromecast settings on the TV — look for the network name displayed on the screen.

If both devices are on the same network and you still don't see your Chromecast, restart your Chromecast by unplugging it for 10 seconds, then plugging it back in. Also restart your casting device. Once both have reconnected to Wi-Fi, try casting again.

If you're using an older Chromecast model, make sure it's running the latest firmware. Chromecast updates automatically when plugged in, but you can force a check by unplugging it for 30 seconds.

Screen sharing performance and what to expect

Screen casting uses your Wi-Fi connection to send video from your device to your TV. The quality depends on your Wi-Fi signal strength and how much bandwidth other devices are using. On a strong network, the picture is sharp and the delay is barely noticeable — usually under one second.

If your Wi-Fi is weak or congested, you may see lag, pixelation, or the connection may drop. Move closer to your router, reduce the number of devices using Wi-Fi, or switch to a less crowded Wi-Fi channel if your router allows it. Some activities like gaming or video editing are more demanding than others — web browsing and presentations usually work smoothly even on average networks.

Your device's screen stays on while casting. If you want to preserve battery on a phone or tablet, plug it in or lower the screen brightness.

Casting a single tab instead of your entire screen

If you only want to share one browser tab instead of your whole screen, you can do that from Windows or Mac. Open Chrome, click the three-dot menu, and select Cast. When the device menu appears, choose Cast tab instead of Cast entire screen. Only that tab will appear on the TV.

Tab casting is useful when you want to show a website or video but keep other windows private. The tab will continue playing on your TV even if you switch to a different tab on your computer, and you can close Chrome without stopping the cast.

Frequently Asked Questions

Can I cast my screen from an iPhone or iPad?

Chromecast does not support screen mirroring from iOS devices through its native casting feature. iPhones and iPads use AirPlay, which works with Apple TV, not Chromecast. Some third-party apps claim to enable iOS screen casting to Chromecast, but they are not officially supported by Google and may not work reliably.

Will casting drain my phone's battery?

Screen casting uses Wi-Fi and your device's processor, which does consume battery faster than normal use. The drain is noticeable but not extreme — you'll lose battery noticeably faster than if the phone were idle, but slower than if you were actively using apps. Plugging in your device while casting solves this problem.

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're already casting, their device will ask whether they want to stop your cast and start their own. You'll need to disconnect before another person can cast.

What if my Chromecast is on a different Wi-Fi network than my computer?

They must be on the same network to cast. If your Chromecast is on your home network but your computer is on a guest network, move your computer to the main network. Check your router settings to see which network your Chromecast joined during setup.

Can I cast while using a VPN?

It depends on your VPN setup. If your VPN routes all traffic through a remote server, your device and Chromecast may not be able to communicate because they appear to be on different networks. Disconnect from the VPN before casting, or check whether your VPN allows local network access, which some do.