What you need before you start

A Chromecast setup takes about five minutes and requires three things: the Chromecast device itself, a TV with an available HDMI port, and a Wi-Fi network you can connect to. You'll also need a phone, tablet, or computer on the same Wi-Fi network to complete the setup — this is what you'll use to send video and audio to your TV.

Before you plug anything in, check that your TV has a free HDMI input. Most TVs have two to four HDMI ports along the back or side. If all ports are full, you may need to unplug another device (like a cable box or gaming console) or use an HDMI splitter. The Chromecast itself is small — about the size of a thumb drive — and plugs directly into the HDMI port.

You don't need a separate remote or any special cables beyond what comes in the box. If your TV's HDMI port doesn't provide enough power to the Chromecast, the box includes a USB power cable you can plug into a wall outlet instead.

Key Takeaways

  • Plug the Chromecast into an available HDMI port on your TV, or use the included USB cable to power it from a wall outlet if the HDMI port doesn't supply enough power.
  • Turn on your TV and switch to the HDMI input where the Chromecast is connected using your TV remote.
  • read the Google Home app on your phone or tablet, open it, and follow the on-screen prompts to connect the Chromecast to your Wi-Fi network.
  • Once connected, you can cast video, music, and photos from compatible apps on your phone, tablet, or computer directly to your TV.
  • If the Chromecast doesn't appear in the Google Home app, restart both the device and your phone, then try again.

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

Insert the Chromecast into an open HDMI port on the back or side of your TV. Push it in firmly until it clicks. If the HDMI port doesn't supply enough power — you'll know because the Chromecast light won't turn on — unplug it and connect the USB power cable that came in the box to the Chromecast, then plug the other end into a wall outlet or a powered USB port on your TV.

Pick up your TV remote and press the input or source button (usually labeled "Input," "Source," or "HDMI"). A menu will appear showing all available inputs. Select the HDMI port where you plugged in the Chromecast. Your TV screen should now show the Chromecast setup screen — a colorful animation with a Google logo.

Step 2: read the Google Home app and start pairing

On your phone or tablet, go to the app store (Google Play Store on Android, App Store on iPhone) and search for "Google Home." read and install the app, then open it. You'll be asked to sign in with a Google account — use the same account you want to use with Chromecast, or create a new one if you don't have one yet.

Once you're signed in, the app will search for nearby Chromecast devices. When it finds yours, a card will appear on the screen showing the Chromecast name and a setup button. Tap it to begin pairing.

Step 3: Connect the Chromecast to your Wi-Fi network

The Google Home app will ask you to confirm the four-digit code displayed on your TV screen. Type this code into your phone to verify you're setting up the correct device. This step prevents someone else's Chromecast from accidentally pairing with your phone.

Next, the app will show a list of available Wi-Fi networks. Select the network you want the Chromecast to use — this should be the same network your phone is on. Enter the Wi-Fi password if prompted. The Chromecast will connect and read any necessary updates, which may take a minute or two.

Step 4: Name your Chromecast and choose a room

The app will ask you to name the Chromecast and assign it to a room in your home (like "Living Room" or "Bedroom"). This is useful if you have multiple Chromecast devices — the name appears in the cast menu so you know which TV you're sending video to. You can change the name and room later in the Google Home app settings.

After you finish naming it, the setup is complete. The Google Home app will show a confirmation screen, and your Chromecast is now ready to use.

Step 5: Cast your first video or photo

Open any app that supports Chromecast — YouTube, Netflix, Spotify, Google Photos, and many others all have built-in cast buttons. Look for the cast icon, which looks like a rectangle with curved lines in the bottom left corner. Tap it, select your Chromecast from the list, and the video or music will start playing on your TV.

You can control playback from your phone — pause, skip, adjust volume — while the content plays on the TV. Your phone screen can go dark or you can use other apps; the content will keep playing on your TV.

Troubleshooting if the Chromecast doesn't appear

If the Google Home app doesn't find your Chromecast, the most common cause is that your phone and the Chromecast are on different Wi-Fi networks. Check that both are connected to the same network name. If you have a 5GHz and 2.4GHz network with the same name, try connecting your phone to the 2.4GHz version — some Chromecast models work better on 2.4GHz.

If they're on the same network and the Chromecast still doesn't appear, restart both devices. Unplug the Chromecast for 10 seconds, plug it back in, and wait for the light to turn on. Then close the Google Home app completely and reopen it. This usually resolves connection issues.

If the Chromecast appears in the app but won't complete setup, check that your Wi-Fi password is correct. A common mistake is typing a password with a capital letter when the actual password uses lowercase, or vice versa. Delete the network from the setup screen and try entering the password again, character by character.

Frequently Asked Questions

Do I need a Google account to use Chromecast?

Yes, you need a Google account to set up the Chromecast using the Google Home app. You can create a free account if you don't already have one. Once it's set up, other people in your home can cast to it without signing in — they just need to be on the same Wi-Fi network.

Can I use Chromecast on a TV without an HDMI port?

No, Chromecast requires an HDMI port. If your TV is older and doesn't have HDMI, you would need to replace the TV or use a different streaming device. Some older TVs have component video ports, but there is no adapter that converts HDMI to component.

What if my Wi-Fi password has special characters?

Type it exactly as it appears, including capital letters, numbers, and symbols. The setup screen shows a keyboard where you can tap each character. If you're unsure of your password, check your router's label or log into your router's settings page on a computer to view or reset it.

Can I cast from my computer to Chromecast?

Yes, if you use Google Chrome as your web browser. Open Chrome, click the three-dot menu in the top right, select "Cast," choose your Chromecast, and you can mirror your entire screen or just a single tab. This works on Windows, Mac, and Linux computers.

Does Chromecast work without internet after it's set up?

No, Chromecast needs a constant Wi-Fi connection to receive video and audio from your phone or computer. If your Wi-Fi goes down, Chromecast stops working until the connection is restored.