Comcast Speed Test – see the available bandwidth to the internet you have

Ever wished you could tell exactly how much bandwidth your internet had at every point in time? Especially in a new location where the internet speed is a bit slow, you might need to ascertain the available bandwidth before going about your downloads. That’s where a Comcast Speed Test comes in. The term ‘bandwidth’ refers to the rate of data flow in digital networks typically measured in bits per second.

The Comcast Speed Test, technically called the XFINITY Speed Test is a Comcast-provided internet speed test. It is a completely free, web-based tool that you can use to see how much available bandwidth to the internet you have at any point in time. Simply put, using the Comcast Speed Test, you can get a general idea of how quickly you’re able to download and upload information over the internet, which impacts how well movies and music stream, how fast files download, and even how smooth your regular internet browsing is.

Comcast Speed Test

Xfinity Speed Test – Check Your Internet Speed

Test your connection fast with Xfinity’s internet speed test tool and get tips on how to improve your internet performance.

Internet Speed Test | Comcast Business – Xfinity › learn › internet-speed-test

Test your Internet upload and download speeds to see how Comcast Business Internet compares to the competition. Get a free quote today for speeds up to 1 Gig.

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Xfinity Internet Speed Test – In Your Area – HighSpeedInternet … › tools › xfinity

Test your Xfinity internet download speed, upload speed, and latency.

XFINITY Speed Test

Xfinity Speed Test Service Provides Free Xfinity Internet Speed Test. Do a quick speed test and see what is your actual internet speed.

Xfinity Internet Speed Test | SmartMove › speedtest › xfinity

Test your Xfinity Internet connection speeds from your home and diagnose potential issues with this interactive Internet speed test from SmartMove.

Xfinity Speed Test – Check Xfinity Internet Speed › speedtest › xfinity-internet-s…

Xfinity Speed Test Tool checks your Xfinity Broadband Internet Speed. Do a quick Upload and Download Speed Test and Check Your Xfinity Internet Speed Easily …

How to Use the Comcast Speed Test Tool


Using the Comcast Speed Test tool is very easy but before then, you will need to have Flash installed and enabled to use the Comcast Speed Test. You’ll also need to have JavaScript enabled in whatever browser you’re using. Most computers are ready to go with both of those things.


  • Firstly, visit the XFINITY Speed Test website,
  • Secondly, click or tap the Start Test button or chose the Advanced Settings link at the top of that page to change the location of the test server.
  • Thirdly, wait while the 3 parts of the test complete.
  • Also, if you’re planning on benchmarking your internet speed with the Comcast Speed Test, click or tap the Share your results button and then open the URL that’s shown to go to the dedicated page of your results. You can then copy and paste the URL anywhere, be it in a document to save for reference next time, an email to share with someone else, etc.
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How the Comcast Speed Tests Works

Like almost all internet speed tests, the Comcast Speeds Tests downloads and uploads a relatively small amount of tests data and measures how long it takes to do so.

Some simple math involving the size of the data packages, as well as the time they took to download or upload, provides a speed in Mbps. The Comcast Speed Tests also tests network latency, in addition, to upload and download speeds.

This tests connect to the closest of 27 Comcasts hosted, OOKLA powered, tests servers to perform the test of your internet speeds and latency.

XFINITY Speed Test & Comcast Speed Tests

The Comcast Speed Tests is the XFINITY Speed Tests and vice versa. They can be used interchangeably. XFINITY is the name given to most of Comcast’s consumer services, one of which is XFINITY Internet. Comcast rebranded their Comcast services as XFINITY beginning in 2010.

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Even though the name change is a number of years old now, the XFINITY Speed Test is still more often referred to as the Comcast Speed Test.

“Can I use the Comcast Speed Tests if I’m not a Comcast/XFINITY customer?”

Yes. The Comcast Speeds Tests is available for anyone to use to tests their internet speed.

Keep in mind, however, that there may be an internet speed test tool from your Internet Service Provider which, depending on why you’re testing your bandwidth, maybe a better option for you.

“Is the Comcast Speed Tests accurate? Is it better than other Internet Speed tests?”

With so many variables that impact your Comcast Speed Tests results, it’s almost impossible to say it is 100% accurate. It’s the same with other bandwidth testing sites as well – the uncertainty isn’t a Comcast/XFINITY problem alone.