By default, Speedtest.net measures your connection speed in Mbps, meaning Megabits Per Second. Mbps is the ISP industry-standard, and we use it on Speedtest.net so you can easily compare your result to your broadband plan's speed. However, we offer four different options on your settings page: It takes 1000 kilobits to make a megabit. 2  MB/s or MegaBytes Per Second-It takes eight megabits to make one megabyte. 3  Most of the files on your computer are measured in megabytes, and if you have a fast connection you'll see this used in download utilities.