What you need before you start

Chromecast setup takes about five minutes and requires three things: the Chromecast device itself, a TV with an available HDMI port, and a smartphone or computer connected to the same Wi-Fi network you plan to use. The Chromecast plugs directly into your TV's HDMI slot — no separate power cable or remote needed for the basic model, though the newer Chromecast with Google TV does include a remote and a power adapter.

Before you plug anything in, decide which Wi-Fi network the Chromecast will use. It needs to be the same network as your phone or computer, since that's how you'll send video and audio to it. If you use a guest network separate from your main one, the Chromecast and your device won't see each other.

Key Takeaways

  • Plug the Chromecast into an HDMI port on your TV, then switch the TV to that HDMI input.
  • Open the Google Home app on your phone or visit google.com/chromecast on a computer to start the setup process.
  • The Chromecast will display a setup code on your TV screen; enter it in the app to confirm you own the device.
  • Connect the Chromecast to your Wi-Fi network during setup, and it will be ready to cast within minutes.

Step 1: Plug in the Chromecast and switch your TV input

Insert the Chromecast into an HDMI port on the back or side of your TV. If your TV has multiple HDMI ports, any of them will work. The basic Chromecast draws power from the HDMI port itself, so nothing else needs to be plugged in. If you have a Chromecast with Google TV, connect the included power adapter to the device and plug it into a nearby outlet.

Pick up your TV remote and switch to the HDMI input where you plugged the Chromecast. You should see the Chromecast logo and a setup code appear on your screen — usually a four-digit number. Write this code down or keep it visible; you'll need it in the next step.

Step 2: Open the Google Home app and select your device

On your smartphone or tablet, read the Google Home app from the Apple App Store or Google Play Store if you don't already have it. Open the app and tap the plus sign (+) in the top left corner, then select "Set up device." Choose "Set up a new device" and pick your country from the list.

The app will search for nearby Chromecast devices. When it finds yours, it will display the setup code that's showing on your TV screen. Tap on the device when you see it listed, and the app will ask you to confirm the code matches what's on your TV. This step confirms you're the one setting it up and not someone else on the same network.

Step 3: Connect to your Wi-Fi network

After you confirm the code, the app will show you a list of available Wi-Fi networks. Select the network you want the Chromecast to use — this must be the same network your phone is connected to. Enter the Wi-Fi password when prompted. The Chromecast will take 30 to 60 seconds to connect.

If the connection fails, double-check that you entered the password correctly and that your phone is on the same network. Some older routers that broadcast only on the 5 GHz band may not work with Chromecast; if that's the case, you'll need to switch to a 2.4 GHz network or ask your internet provider about a dual-band router.

Step 4: Name your device and finish setup

Once the Chromecast connects to Wi-Fi, the app will ask you to name it. You can call it "Living Room TV," "Bedroom," or anything else that helps you remember which TV it's connected to. This name appears in the cast menu whenever you try to send video from your phone or computer, so choose something you'll recognize.

The app will then ask whether you want to set up voice control with Google Assistant and whether you want to link your Google account for personalized recommendations. Both steps are optional. Once you finish, your Chromecast is ready to use — you can close the Google Home app and start casting from any compatible app on your phone.

Casting from your phone or computer

To send video from your phone, open any app that supports casting — YouTube, Netflix, Spotify, and most streaming services have a cast button. It looks like a rectangle with a Wi-Fi symbol in the corner. Tap it, select your Chromecast from the list, and the video will start playing on your TV within a few seconds.

From a computer, open Chrome and go to any website with video content. Click the three dots in the top right corner of Chrome, select "Cast," and choose your Chromecast. Your entire browser tab or your whole screen can be cast, depending on what you select. The video will play on your TV while you control it from your computer.

Troubleshooting common setup problems

If the Google Home app doesn't find your Chromecast, make sure the device is plugged in and powered on — you should see the Chromecast logo on your TV screen. Restart your phone's Wi-Fi and try again. If your phone is on a different network than the Chromecast, they won't be able to communicate; check that both are connected to the same Wi-Fi name.

If the Chromecast connects to Wi-Fi but casting doesn't work, restart both the Chromecast and your phone. Unplug the Chromecast for 10 seconds, plug it back in, and wait for it to fully boot up. If you're still having trouble, you can reset the Chromecast by holding the reset button (a small indent on the device) for 25 seconds until the light blinks, then set it up again from the beginning.

Frequently Asked Questions

Do I need a Google account to set up Chromecast?

You need a Google account to use the Google Home app and set up the device, but you don't need to link your account to the Chromecast itself if you don't want personalized recommendations. The setup process will ask if you want to link your account; you can skip this step and still cast video normally.

Can I use Chromecast on a 5 GHz Wi-Fi network?

Most newer Chromecast models support 5 GHz networks, but some older models only work on 2.4 GHz. Check your router settings to see if you can enable a 2.4 GHz band alongside your 5 GHz network. If your router broadcasts both, the Chromecast should connect to whichever one is available.

What if I don't have the Google Home app?

On a computer, you can set up Chromecast by visiting google.com/chromecast in Chrome and following the on-screen steps. You'll still need a Google account, but you don't have to read an app. On a phone without the Google Home app, you'll need to read it from your device's app store.

Can multiple people cast to the same Chromecast?

Yes. Once setup is complete, anyone on the same Wi-Fi network can cast to your Chromecast from their phone or computer. They don't need a Google account or any special permission — they just need to be connected to the network and have a compatible app open.

How do I reset my Chromecast if I forget the Wi-Fi password?

Hold the reset button on the Chromecast for 25 seconds until the light blinks. This erases all settings and returns it to factory defaults. You can then set it up again with a new Wi-Fi network using the Google Home app.