How to connect your Chromecast to WiFi

Your Chromecast needs to be on the same WiFi network as your phone or computer to work. The setup process takes about five minutes and happens through the Google Home app on your phone — you won't need to touch the Chromecast itself after plugging it in. The app walks you through finding your network, entering your password, and confirming the connection.

Before you start, make sure you have your WiFi network name and password ready. If you don't know your password, you can find it on the back of your router or in your router's settings. You'll also need a phone or tablet with the Google Home app installed — you can download it free from the Google Play Store (Android) or the App Store (iOS).

Key Takeaways

  • Plug your Chromecast into a power outlet and an HDMI port on your TV, then wait for the light to start blinking.
  • Open the Google Home app on your phone, tap the plus icon, and select "Set up device" to begin the connection process.
  • When prompted, select your WiFi network from the list and enter your password exactly as it appears on your router.
  • The Chromecast will confirm the connection within a minute, and you can then name it and choose which room it's in.

What you need before you start

Have your WiFi password written down or visible before you open the Google Home app. The app will ask for it during setup, and you need to type it exactly right — capital letters, numbers, and special characters all matter. If you're not sure what your password is, check the sticker on the back or bottom of your router; it usually says "WiFi Password" or "Network Key."

Make sure your phone or tablet is already connected to the same WiFi network. The Google Home app uses your phone's connection to communicate with the Chromecast while it's setting up. If your phone is on a different network or on mobile data, the setup won't work.

Plugging in and powering on your Chromecast

Connect the USB power cable to the back of the Chromecast and plug the other end into a power outlet. Then plug the Chromecast itself into an HDMI port on your TV — usually labeled HDMI 1, HDMI 2, or HDMI 3 on the back or side. Turn on your TV and switch to the HDMI input where you plugged in the Chromecast.

You should see a Google logo appear on your TV screen within 30 seconds. Below the logo, a four-digit code will appear. This code confirms that your Chromecast is powered on and ready to connect. The light on the Chromecast itself will blink white while it's waiting for setup.

Using the Google Home app to connect

Open the Google Home app on your phone and tap the plus icon in the top left corner. Select "Set up device," then choose "Set up a new device." The app will ask if you want to set up a device in a new home or add it to an existing home — if this is your first Chromecast, choose "Create new home" and follow the prompts to name your home and select your country.

The app will then search for nearby devices. When it finds your Chromecast, it will show you the four-digit code that's on your TV screen. Confirm that the code matches what you see on your TV, then tap "Yes" to continue. This step proves that your phone and Chromecast can see each other.

Entering your WiFi network and password

The app will show you a list of WiFi networks in range. Find your network name in the list and tap it. If you don't see your network, make sure your router is turned on and that you're close enough to it. Some routers broadcast two networks at once — one labeled with "5G" or "5GHz" and one without — and either one will work, though the non-5G network sometimes connects more reliably for Chromecast.

When you tap your network, the app will ask you to enter your WiFi password. Type it carefully, paying attention to uppercase and lowercase letters. If you make a mistake, the Chromecast will fail to connect and you'll have to start over. After you enter the password, tap "Next" and wait for the connection to complete — this usually takes 30 to 60 seconds.

Confirming the connection and naming your device

Once the Chromecast connects, your TV screen will change and the app will show a confirmation message. The light on the Chromecast will stop blinking and turn solid white. At this point, the app will ask you to name your Chromecast — something like "Living Room" or "Bedroom TV" — so you can tell it apart if you set up more than one later.

You can also choose which room the Chromecast is in from a list of common rooms, or create a custom room name. This helps the Google Home app organize your devices. After you finish naming it, tap "Next" and the app will show you a summary of your setup. You're now ready to cast videos, music, and photos from your phone to your TV.

What to do if the connection fails

If the app says "Unable to connect" or the Chromecast doesn't appear in the list of devices, the most common cause is an incorrect password. Go back and re-enter your WiFi password character by character, making sure you haven't missed any capital letters or numbers. If you're still not sure what the password is, check your router again or contact your internet provider.

If the password is correct but the connection still fails, try moving your phone closer to the Chromecast and router, then restart the setup process. Sometimes the Chromecast needs to be restarted as well — unplug it from power for 10 seconds, plug it back in, and wait for the Google logo to appear on your TV before opening the app again.

Frequently Asked Questions

Can I use a guest WiFi network for my Chromecast?

Yes, but your phone and the Chromecast must be on the same network. If your router has a separate guest network, you can connect the Chromecast to it, but then you'll need to connect your phone to the guest network too in order to cast. Most people find it easier to use the main network instead.

What if I forgot my WiFi password?

Check the sticker on your router — it usually has the password printed on it. If the sticker is worn off or missing, you can reset your router to factory settings by holding the reset button for 10 seconds, which will restore the default password on the sticker. You'll then need to set up your WiFi again from scratch on all your devices.

Do I need to reconnect my Chromecast every time I turn on my TV?

No. Once the Chromecast is connected to your WiFi, it stays connected even when your TV is off. As long as the Chromecast is plugged in and your WiFi is running, you can cast to it anytime without redoing the setup.

Can my Chromecast connect to a 5GHz network?

Yes, many Chromecast models support 5GHz networks. If your router broadcasts both 2.4GHz and 5GHz, you'll see both network names in the app. The 5GHz network is usually faster, but 2.4GHz sometimes has better range. Either will work for casting.