The speed test takes less than a minute and performs two key measurements: Download speed (the speed of data sent from the Internet to your computer) Upload speed (the speed of data sent from your computer to the Internet) We also report latency, a factor that could influence your speed. How does the internet connection speed test work? The internet connection speed test measures that amount of time that it takes to download and upload a file. This is a non-obtrusive test and the test determines your internet connection speed based on the amount of time that it takes to upload and download the file. Check your internet connection speed with the free network speed test from Verizon. Don't take your internet service provider's word for it concerning your upload and download speeds. Find out how fast your internet is, and see how it compares to Fios and DSL connections. Let's test your Internet speed. The Xfinity Speed Test will show you the download and upload speeds from our speed test servers to your device. You are connected to Xfinity WiFi. If you are at home, please connect to your home WiFi network. Learn about the things that may affect your test results.