The basic pairing process
Pairing your Chromecast to your phone means connecting them to the same Wi-Fi network so your phone can send video, music, or photos to your TV. The process takes about five minutes and requires only your phone, your Chromecast device, and your Wi-Fi password.
Start by plugging your Chromecast into an HDMI port on your TV and into a power outlet. Wait for the light on the Chromecast to stop blinking — this means it has powered up. Then open the Google Home app on your phone (available free on both Android and iPhone from the Google Play Store or Apple App Store).
Tap the plus sign (+) in the top left corner of the Google Home app and select "Set up device." Choose "Set up a new device" and then select your Chromecast from the list of devices the app finds. The app will ask you to confirm a code that appears on both your TV screen and your phone — this confirms you are setting up the right device.
Key Takeaways
- Your phone and Chromecast must be on the same Wi-Fi network to communicate with each other.
- The Google Home app is the tool you use to pair them and manage the connection afterward.
- A code appears on your TV screen during setup to confirm you are pairing the correct device.
- Once paired, you can cast from any app on your phone that supports Chromecast — you do not need to pair again for each app.
- If your phone and Chromecast are on different Wi-Fi networks, they cannot find each other.
Choosing and entering your Wi-Fi network
After you confirm the setup code, the Google Home app will ask you to select your Wi-Fi network from a list. Choose the network your phone is already connected to — this is usually your home Wi-Fi. If you have both a 2.4 GHz and 5 GHz network with the same name, pick the one your phone uses (your phone settings will show which one).
Enter your Wi-Fi password exactly as it is — upper and lowercase letters, numbers, and symbols all matter. If you are unsure of your password, check your router (the password is often printed on a sticker on the back or bottom) or contact your internet provider.
The app will confirm that your Chromecast has connected to the network. This may take a minute or two. Once the connection is confirmed, your phone and Chromecast are paired and ready to use.
What to do if your phone does not find the Chromecast
If the Google Home app does not show your Chromecast in the device list, the most common cause is that your phone and Chromecast are not on the same Wi-Fi network. Check your phone's Wi-Fi settings and make sure you are connected to the same network your Chromecast is trying to join.
If both devices are on the same network and the app still does not find it, try restarting your Chromecast. Unplug it from power for 30 seconds, then plug it back in and wait for the light to stop blinking. Open the Google Home app again and try the setup process once more.
If your Chromecast is more than 15 feet from your router or blocked by walls, it may have trouble connecting. Move it closer to the router temporarily during setup, then move it back once the pairing is complete.
Casting content once you are paired
Once your phone and Chromecast are paired, you can send video, music, or photos from your phone to your TV. Open any app that supports Chromecast — YouTube, Netflix, Spotify, Google Photos, and many others all work. Look for the cast icon (it looks like a rectangle with curved lines in the bottom left corner) and tap it.
A list of available devices will appear. Select your Chromecast, and the content will start playing on your TV. Your phone becomes a remote — you can pause, skip, adjust volume, or stop playback from the phone screen. You can also lock your phone and the content keeps playing.
Not every app supports Chromecast. If you do not see the cast icon in an app, that app cannot send to Chromecast. Some apps require a paid subscription to use casting.
Pairing a second phone or device to the same Chromecast
Multiple phones can be paired to the same Chromecast as long as they are all on the same Wi-Fi network. Each phone just needs to have the Google Home app installed and signed in with a Google account. The second phone does not need to go through the full setup process — it will straightforward see the Chromecast in the cast menu once it is on the same network.
If a second phone is on a different Wi-Fi network (for example, a guest using a guest network), it will not be able to see or cast to the Chromecast. The networks must match.
Troubleshooting a connection that stops working
If your phone was paired to your Chromecast but suddenly cannot find it, the most likely cause is that one of them lost the Wi-Fi connection. Check that your phone is still connected to Wi-Fi and that your Chromecast's light is on. If the light is off or blinking red, unplug the Chromecast for 30 seconds and plug it back in.
If your Wi-Fi network went down and came back up, your Chromecast may have reconnected to a different network or failed to reconnect. Restart your router by unplugging it for 30 seconds, then plug it back in and wait for it to fully restart (usually two to three minutes). Once your phone reconnects to Wi-Fi, your Chromecast should appear in the cast menu again.
If you changed your Wi-Fi password, your Chromecast will not be able to reconnect using the old password. You will need to set it up again using the Google Home app with the new password.
When to contact support
If you have tried restarting both your phone and Chromecast, confirmed they are on the same Wi-Fi network, and the Google Home app still will not complete setup, contact Google support through the Google Home app. Tap your profile picture in the top right, select "Help & feedback," and describe the problem. Google support can walk you through additional troubleshooting steps specific to your situation.
If your Chromecast hardware is damaged or the light will not turn on even after being plugged in for several minutes, the device itself may need replacement. Check the warranty information that came with your Chromecast to see what is covered.
Frequently Asked Questions
Do I need a Google account to pair my phone to Chromecast?
You need a Google account to use the Google Home app, which is the tool that pairs your phone and Chromecast. If you do not have a Google account, you can create one free through the app during setup.
Can I pair my Chromecast to my phone if I do not know my Wi-Fi password?
You need your Wi-Fi password to complete the pairing process. Check the back or bottom of your router for a sticker with the password, or contact your internet provider. If you have changed the password and forgotten it, you can reset your router to factory settings, but this will erase all your Wi-Fi settings.
What if my phone is on a 5 GHz network and my Chromecast is on 2.4 GHz?
They will not be able to communicate. Both devices must be on the same Wi-Fi network. If your router broadcasts both frequencies with the same name, connect your phone to the same frequency your Chromecast is using. You can check which frequency your phone is on in your phone's Wi-Fi settings.
Can I cast to my Chromecast from outside my home?
No. Your phone and Chromecast must be on the same Wi-Fi network to pair and cast. If you are away from home and on a different network, you cannot cast to a Chromecast at home. Some Chromecast models support remote casting if you set it up through the Google Home app, but this requires additional configuration.
Will pairing my phone to Chromecast use a lot of data?
Casting uses your home Wi-Fi network, not your phone's cellular data. Once the content starts playing on your TV, the data flows from the internet to your Chromecast directly, not through your phone. Your phone only sends the initial command to start playback.