Start with the basics: what you need before you begin

Before you plug in your Chromecast, gather these items: your Chromecast device, a power source (USB cable and adapter, or power cable depending on your model), a TV with an HDMI port, and a smartphone or computer with WiFi. You will also need the Google Home app on your phone or tablet—read it free from the Apple App Store or Google Play Store. Have your WiFi network name and password ready; you will enter them during setup.

Check that your TV is powered on and set to the HDMI input where you will plug in the Chromecast. If you are using a Chromecast with Google TV (the larger model with a remote), you will also need two AAA batteries for the remote. Older Chromecast models (the small dongle) do not come with a remote.

Key Takeaways

  • Plug your Chromecast into an HDMI port on your TV and connect power, then wait 30 seconds for the setup screen to appear on your television.
  • Open the Google Home app on your phone, tap the plus icon, select "Set up device," and choose "Set up a new device" to begin pairing.
  • When prompted, select your home WiFi network and enter your password so the Chromecast can connect to the internet.
  • Name your Chromecast something you will recognize (like "Living Room TV"), and assign it to a room in your home for easier control later.
  • Once setup is complete, you can cast from compatible apps like YouTube, Netflix, and Spotify by tapping the cast icon inside the app.

Plug in your Chromecast and wait for the setup screen

Insert the Chromecast into an available HDMI port on the back or side of your TV. Plug the power cable into the Chromecast and connect it to a power outlet, or plug the USB cable into a powered USB port on your TV if your TV has one. The Chromecast will take about 30 seconds to boot up.

Your TV screen should show a colorful setup screen with a code and instructions. If nothing appears, make sure your TV is on and set to the correct HDMI input. Use your TV remote to switch inputs until you see the Chromecast welcome screen. Do not skip this step—you need to see this screen to confirm the device is working.

Open the Google Home app and start pairing

On your smartphone or tablet, open the Google Home app. If you do not have it, read it free from your device's app store. Tap the plus icon (+) in the top left corner, then select "Set up device." Choose "Set up a new device" from the menu that appears.

The app will search for nearby Chromecast devices. When your Chromecast appears in the list, tap it to begin pairing. The app will ask you to confirm that you see a code on your TV screen—this code matches the one shown in the app. Tap "Yes" to confirm you see the matching code. This step verifies that your phone and Chromecast are communicating correctly.

Connect your Chromecast to WiFi

The app will now ask you to select your WiFi network from a list. Tap the network name you use at home. If your network does not appear, tap "Other networks" and type the name manually. Enter your WiFi password exactly as it is—passwords are case-sensitive, so uppercase and lowercase letters matter.

Wait for the app to confirm the connection. This usually takes 10 to 20 seconds. If the connection fails, double-check that you entered your password correctly and that your WiFi network is working. If you are still having trouble, restart your router by unplugging it for 30 seconds, then plug it back in and try again.

Name your device and assign it to a room

Once WiFi is connected, the app will ask you to name your Chromecast. Choose a name that describes where it is located, such as "Living Room TV," "Bedroom," or "Kitchen." This name will appear in the Google Home app and in any app you use to cast to this device, so pick something you will recognize at a glance.

Next, the app will ask you to assign the device to a room in your home. Select the room where the TV is located, or create a new room if this is your first Chromecast. Assigning it to a room makes it easier to control multiple devices later—you can say "Hey Google, play music in the living room" and it will know which speaker or TV you mean.

Complete setup and test casting

The app will show a confirmation screen when setup is finished. Tap "Done" to close the setup wizard. Your Chromecast is now ready to use. The device will remember your WiFi network and will reconnect automatically each time you turn on your TV.

To test that everything works, open any app that supports casting—YouTube, Netflix, Spotify, or Google Photos are good choices. Look for the cast icon (it looks like a rectangle with WiFi waves in the corner) and tap it. Select your Chromecast from the list. The app should begin playing on your TV within a few seconds. If you do not see the cast icon, the app may not support casting, or your phone may not be on the same WiFi network as the Chromecast.

Troubleshooting common setup problems

If your Chromecast does not appear in the Google Home app, make sure your phone is connected to the same WiFi network as the Chromecast. The device will not show up if your phone is on a different network or on mobile data. Also check that your phone and Chromecast are within 15 feet of your WiFi router—distance and obstacles can weaken the signal.

If the setup screen never appears on your TV, try a different HDMI port. Some TV ports are labeled for specific purposes (like gaming or 3D), and the Chromecast may not work in those ports. If you are using a USB power source, try plugging the Chromecast into a standard power outlet instead—USB ports on older TVs sometimes do not provide enough power. If the device still does not work after trying these steps, unplug it for one minute, plug it back in, and wait for the setup screen to reappear.

Frequently Asked Questions

Do I need a Google account to use Chromecast?

You need a Google account to set up the device through the Google Home app, but once setup is complete, anyone on your WiFi network can cast to it without signing in. Guests can cast from their own phones without knowing your Google password.

Can I use Chromecast without WiFi?

No, Chromecast requires an internet connection to work. It connects to your home WiFi network during setup and stays connected to cast content from your phone or computer. If your WiFi goes down, the Chromecast will not function.

What if I forget my WiFi password?

You can reset your Chromecast and set it up again with a different network. To reset it, hold the button on the device for 15 seconds until the light blinks. The setup screen will reappear on your TV, and you can start the pairing process over with a new WiFi network.

Can I set up Chromecast from a computer instead of a phone?

You can cast from a computer to an already-set-up Chromecast, but the initial setup requires the Google Home app on a phone or tablet. Once the device is configured, you can use it with any computer or phone on your network.

How do I add a second Chromecast to my home?

Open the Google Home app, tap the plus icon, and repeat the setup process for the new device. Give it a different name and assign it to a different room. Both devices will appear in the app and in your casting options once they are both set up.