You can’t run a speed test directly on a Chromecast using a documented Google feature. Instead, check which Wi-Fi network it uses, then run a speed test on a phone or computer connected to that same network near the TV. Compare that result with a test near the router to help identify whether Wi-Fi coverage is weaker by the TV.
Check which network your Chromecast uses
Confirm the Chromecast’s connected network before testing. The settings route depends on the device:
- Chromecast with Google TV: On the TV, open the profile or settings area, then go to All settings → Network and Internet. Google TV troubleshooting also directs users to Settings → Network & Internet to check Wi-Fi and the selected network. Google’s Chromecast connection guide and its Google TV troubleshooting guide cover these checks.
- Earlier Chromecast models: In the Google Home app, select and hold the Chromecast tile, then open Settings → Device information → Wi-Fi. This shows the connected network, not its measured speed. Google’s connection guide gives this route.
Network-band support varies by model. Google says the first-generation Chromecast supports only 2.4 GHz Wi-Fi, so don’t assume every Chromecast can use the same Wi-Fi bands. See Google’s Wi-Fi connection guidance.
Test the Wi-Fi near the TV
- Connect a phone or computer to the same Wi-Fi network shown in the Chromecast’s settings.
- Stand near the TV and run an internet speed test on that device.
- Note the result and where you took the test. It estimates the network performance at that spot; it does not measure throughput on the Chromecast itself.
For a useful comparison, run another test on the same device and network near the router. This comparison is a practical diagnostic, not a Google-prescribed test or a published pass/fail threshold. If the result is notably better by the router, distance, Wi-Fi coverage, or interference near the TV may be contributing.
#1 Best Overall
- The Google TV Streamer (4K) delivers your favorite entertainment quickly, easily, and personalized to you[1,2]
- HDMI 2.1 cable required (sold separately)
- See movies and TV shows from all your services right from your home screen[2]; and find new things to watch with tailored recommendations for everyone in your home based on their interests and viewing habits
- Watch live TV and access over 800 free channels from Pluto TV, Tubi, and more[3]; if you find an interesting show or movie on your TV, mobile app, or Google search, you can easily add it to your watchlist, so it’s ready when you are[2]
- Up to 4K HDR with Dolby Vision delivers captivating, true-to-life detail[4]; and you can connect speakers that support Dolby Atmos for more immersive 3D sound
Use the results to narrow down the problem
If other devices also have trouble
Check whether other devices can connect to Wi-Fi and access the internet. If they also fail, investigate the router or internet service before focusing on the Chromecast. Google’s Reconnect me troubleshooting guide recommends checking other devices’ connection and internet access.
If other devices work but Chromecast playback does not
Check the Chromecast’s selected network, restart the relevant devices, and check the router’s firmware. Google also recommends considering router placement, interference, and whether the wireless network can support the number of connected devices. For interference reduction, Google advises: “To help prevent Wi-Fi or Bluetooth interference, move your streaming device further away from your TV. Also, don’t let it touch other devices, wires or cables.” See Google’s connection troubleshooting steps.
Rank #2
- The Google TV Streamer (4K) delivers your favorite entertainment quickly, easily, and personalized to you[1,2]
- HDMI 2.1 cable required (sold separately)
- See movies and TV shows from all your services right from your home screen[2]; and find new things to watch with tailored recommendations for everyone in your home based on their interests and viewing habits
- Watch live TV and access over 800 free channels from Pluto TV, Tubi, and more[3]; if you find an interesting show or movie on your TV, mobile app, or Google search, you can easily add it to your watchlist, so it’s ready when you are[2]
- Up to 4K HDR with Dolby Vision delivers captivating, true-to-life detail[4]; and you can connect speakers that support Dolby Atmos for more immersive 3D sound
On Google TV, try playback in an app after checking its Wi-Fi settings. Successful playback indicates the connection works for that use, but it is not a numeric speed measurement. Google’s Google TV troubleshooting guide covers network and playback checks.
Compare with a wired connection if available
A compatible Ethernet adapter is another option in Google’s connection troubleshooting guidance. If you try one, compare wired playback or a speed test on a connected device with your Wi-Fi results, keeping in mind that device, location, and connection type differ. Wired results can help you assess whether Wi-Fi is contributing; neither path directly measures Chromecast throughput. Google does not name a specific adapter model in the cited guidance, so check compatibility with your Chromecast generation before choosing one.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Rank #3
- Watch the entertainment you love with Chromecast with Google TV, including live TV in up to 4K HDR; discover over 700,000 movies and TV episodes, plus millions of songs
- Get fast streaming, and enjoy a crystal clear picture up to 4K and brighter colors with HDR
- Your home screen displays movies and TV shows from all your services in one place with Chromecast 4K; get personal recommendations based on your subscriptions, viewing habits, and content you own
- Press the Google Assistant button on the remote and use voice search to find specific shows, youtube tv streaming, or search by mood, genre, actress, and more; control the volume, switch inputs, play music, and get answers, hands-free
- Chromecast is easy to install and compatible with almost any TV that has an HDMI port; to get started, just plug it into your TV’s HDMI port, connect to Wi-Fi, and start streaming
What speed does Chromecast need for 4K?
Google lists a connection requirement of at least 20 Mbps for 4K content on supported devices. The support page does not state a publication year. Google also cautions that internet service availability and other factors affect playback, so meeting this minimum does not guarantee smooth streaming. Check Google’s Chromecast and Google TV Streamer requirements.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Check for network restrictions
Some Wi-Fi networks require users to sign in through a captive portal, as is common at hotels, schools, dormitories, and businesses. Google says streaming devices do not support these networks. See Google’s Wi-Fi connection guidance.
Quick Recap
Best Value
- Essential 4K streaming – Get everything you need to stream in brilliant 4K Ultra HD with High Dynamic Range 10+ (HDR10+).
- The newest Fire TV experience (2026) – Our biggest update to Fire TV has a new, modern design that gets you to your entertainment fast. Browse dedicated content categories, pin more of your favorite apps, and get personalized recommendations from Alexa+. Spend less time scrolling, and more time watching.
- Make your TV even smarter – Fire TV gives you instant access to a world of content, tailor-made recommendations, and Alexa, all backed by fast performance.
- All your favorite apps in one place – Experience endless entertainment with access to Prime Video, Netflix, YouTube, Disney+, Apple TV+, HBO Max, Hulu, Peacock, Paramount+, and thousands more. Easily discover what to watch from hundreds of thousands of movies and TV episodes (subscription fees may apply), including free, ad-supported content.
- Getting set up is easy – Plug in and connect to Wi-Fi for smooth streaming.
Rank #4
- HD streaming made simple: With America’s number 1 TV streaming platform,* exploring popular apps—plus tons of free movies, shows, and live TV—is as easy as it is fun. *Based on hours streamed—Hypothesis Group
- Compact without compromises: The sleek design of Roku Streaming Stick won’t block neighboring HDMI ports, and it even powers from your TV alone, plugging into the back and staying out of sight. No wall outlet, no extra cords, no clutter.
- No more juggling remotes: Power up your TV, adjust the volume, and control your Roku device with one remote. Use your voice to quickly search, play entertainment, and more.
- Shows on the go: Take your TV to-go when traveling—without needing to log into someone else’s device.
- TV, simplified: With setup that only takes minutes, a simple-to-navigate Home Screen, and an uncluttered remote control that does all you need—Roku makes it easier to watch the TV you love.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
