What Chromecast does and what you need before you start
Chromecast is a small device that plugs into your TV's HDMI port and lets you send video, music, and photos from your phone, tablet, or computer to your TV screen. It does not have its own remote — you control it from whatever device you are already holding. The device itself costs between $30 and $100 depending on the model, and you need a WiFi network to use it.
Before you plug anything in, gather three things: your Chromecast device, a USB power cable (usually included), and the name and password of your WiFi network. You will also need a phone or tablet with the Google Home app installed — this is what you use to set up the device and tell it which WiFi to connect to. If you do not have the Google Home app yet, read it from the App Store (iPhone) or Google Play (Android) before you start.
The physical setup takes two minutes. The actual connection — getting Chromecast to talk to your WiFi — takes five to ten minutes and is where most people get stuck, so this guide walks through exactly what to expect at each step.
Key Takeaways
- Plug the Chromecast into an HDMI port on your TV and connect the power cable, then switch your TV to that HDMI input.
- Open the Google Home app on your phone or tablet and tap the plus icon to add a new device.
- When the app asks you to confirm the code on your TV screen, read the four-digit code shown on the TV and type it into the app to prove you are in the same room.
- Select your WiFi network from the list and enter your WiFi password exactly as it is — capital letters, numbers, and special characters all matter.
- Once the app says the device is connected, you can cast from any compatible app on your phone by tapping the cast icon.
Plugging in the device and switching to the right TV input
Look at the back or side of your TV and find the HDMI ports — they are rectangular slots, usually labeled HDMI 1, HDMI 2, and so on. Plug the Chromecast into one of these ports. It does not matter which one, but remember the number because you will need to switch your TV to that input in a moment.
Plug the USB power cable into the Chromecast. The other end goes into a power outlet, a USB port on your TV (if your TV has one), or a USB power adapter. The device will light up — you should see a light on the Chromecast itself or a Google logo appear on your TV screen within 30 seconds.
Pick up your TV remote and look for a button labeled "Input," "Source," or "HDMI." Press it and select the HDMI port where you plugged in the Chromecast — for example, "HDMI 1" or "HDMI 2." Your TV screen should now show a setup screen with a Google logo and a four-digit code. Leave this on the screen; you will need it in the next step.
Opening Google Home and starting the setup
On your phone or tablet, open the Google Home app. If you do not have it, read it now from the App Store (iPhone) or Google Play (Android) — it is free. When you open it for the first time, you may be asked to sign in with a Google account. Use any Google account you have; it does not have to be the same one you use for email.
Once you are in the app, look for a plus icon (usually in the top left or bottom right corner, depending on your phone). Tap it and select "Set up device" or "Set up new device." The app will ask what you want to set up — choose "Set up a new device" and then select "Chromecast" from the list.
The app will search for your Chromecast on your WiFi network. This usually takes 10 to 20 seconds. If it finds your device, it will show you the name of the Chromecast (often something like "Living Room" or a default name). Tap on it to continue.
Confirming the code to prove you are in the same room
The app will now ask you to confirm a code. Look at your TV screen — you should see a four-digit code displayed. Read this code and type it into your phone or tablet where the app is asking for it. This step proves to Google that you are physically in the same room as the device and that you own it.
Type the code carefully. If you enter the wrong code, the app will reject it and ask you to try again. Look at the TV screen again and re-enter the code. Once you type the correct code, the app will move to the next step.
Connecting to your WiFi network
The app will now show you a list of WiFi networks available in your home. Find your WiFi network name in the list and tap it. If you do not see your network, make sure your WiFi router is turned on and that you are close enough to it. You can also scroll down to see if there are more networks below.
The app will ask you to enter your WiFi password. Type it exactly as it is — WiFi passwords are case-sensitive, which means capital letters are different from lowercase letters. If your password is "MyPassword123," typing "mypassword123" will not work. If you are not sure of your password, check the sticker on the back of your WiFi router or check your router's settings on a computer.
Once you enter the password, tap "Next" or "Connect." The app will try to connect your Chromecast to the WiFi network. This usually takes 30 seconds to two minutes. You will see a progress bar or a spinning circle while it works. Do not unplug the device or close the app during this time.
What to do if the connection fails
If the app says "Connection failed" or "Could not connect," the most common reason is that you entered the WiFi password incorrectly. Go back and try again, paying close attention to capital letters and numbers. If you are still not sure about the password, you can reset your WiFi router and set a new password, but that will disconnect all your other devices temporarily.
If the password is correct but the connection still fails, try moving your phone and the Chromecast closer to your WiFi router. Sometimes the signal is too weak in certain parts of the house. Once you move closer and the connection succeeds, the Chromecast will remember the WiFi network and will reconnect automatically in the future, even if you move it back to its original location.
If you see an error message about "2.4 GHz" or "5 GHz," your router may be broadcasting two different WiFi networks. Try connecting to the 2.4 GHz network first — Chromecast devices work more reliably on 2.4 GHz, even though 5 GHz is faster. You can check which network you are connecting to by looking at the network name in the list; it often has "2.4" or "5" in the name.
Testing the connection and casting your first video
Once the app says "Device connected" or "Setup complete," your Chromecast is ready to use. The app may ask you to give the device a name (like "Living Room" or "Bedroom") and to assign it to a room in your home. You can skip these steps if you want, but naming it makes it easier to find later if you have multiple Chromecast devices.
To test that everything is working, open any app on your phone that supports casting — YouTube, Netflix, Spotify, and Google Photos all work. Look for a cast icon, which usually looks like a rectangle with WiFi waves in the corner. Tap it and select your Chromecast from the list. The video or music should appear on your TV within a few seconds.
If the cast icon does not appear in an app, that app may not support Chromecast. You can also cast your entire phone screen to the TV by opening Google Home, tapping your Chromecast device, and selecting "Cast screen." This works with any app, though it uses more battery and may be slower.
Frequently Asked Questions
Do I need a Google account to use Chromecast?
Yes, you need a Google account to set up the device using the Google Home app. You can use any Google account — it does not have to be a Gmail address. Once the device is set up, other people in your home can cast to it without signing in, as long as they are on the same WiFi network.
What if my WiFi password has special characters or spaces?
Type it exactly as it appears, including spaces, symbols, and capital letters. If your password is "My-WiFi@Home 2024," type all of that, including the hyphen, the @ symbol, the space, and the numbers. One mistake will cause the connection to fail.
Can I move my Chromecast to a different room after I set it up?
Yes. Once it is connected to your WiFi, it will remember that network and reconnect automatically in any room where the signal reaches. If you move it to a location where the WiFi signal is too weak, you can reconnect it to the same network using the Google Home app.
Why does my Chromecast keep disconnecting from WiFi?
This usually means the WiFi signal is weak where the device is located. Try moving it closer to your router, or consider getting a WiFi extender to boost the signal in that room. You can also check if your router needs to be restarted — unplug it for 30 seconds and plug it back in.
Can I use Chromecast without WiFi?
No, Chromecast requires a WiFi connection to work. It uses WiFi to receive video and audio from your phone or computer, so there is no way around it. If you do not have WiFi in your home, you would need to set up a WiFi network first.