![]() ![]() YouTube recommends a video bitrate range between 13,00034,000 Kbps to stream in 4K at 30fps. ![]() So a 2Mbps DSL line, even if it was actually providing precisely that line rate, would actually give a lower measurement (around 1.85Mbps). In most cases, streaming in 1080p will provide all of the detail that a viewer could ever want to see however, streaming in 4k is possible if desired. So a 2Mbps DSL line would be expected to provide a maximum download speed of 232KB/s.īy the way, speed testing sites generally just measure the usable data rate over TCP and then multiply by eight. TCP over DSL has a maximum efficiency of about 95%, so multiply by 0.95 to get 232KB/s. You can then divide by 1,024 to get kilobytes per second, or 244KB/s. You divide by 8 to get bytes per second, or 250,000. So if you have a "2Mbps DSL" service, that means your line carries 2,000,000 bits per second. The overhead of the line encoding is already figured in, but the overhead of control and address information is not. ![]() Also, the line doesn't just carry data, it has to carry address and control information as well. Data transfer rates are measured in binary units and bytes per second. Line speeds are measured in decimal units and in bits per second. If you require an exact calculation, and you're unclear what units the result is in, you need to ask the developers how the math was implemented in the program or operating system. Note that kilobyte is a common misnomer for kibibyte, but the difference is neglegible for most purposes (as you can see above, both results are fairly close to eachother). What your browser/download tool uses depends on how the developers implemented the math, but in the case they do use mebibytes/kibibytes, your theoretical maximum speed would simply be:ĢMb/s = 2Mb/s * 1Mb/8MiB = 0.25MiB/s -> 0.25MiB/s * 1024 kiB/MiB = 256 kiB/s The convention for unit steps of 1024 is used for mebibyte (MiB), which consists of 1024 kibibytes (kiB). Note that I have used megabyte here, which assumes 1000 kilobytes per megabyte. So you can theoretically cap out at just under 250 kilobytes per second. To convert to mega bytes (MB), you simply divide by 8, since there are 8 bits in a byte:ĢMb/s = 2Mb/s * 1Mb/8MB = 0.25MB/s = 250 kB/s To convert Megabits to Kilobytes, convert 1 Megabit to 1000 Kilobytes and divide by 8 bits in a byte.Mb/s means mega bits per second. Step 1: Run the console speed test Minimum download speed of 1 Mbps (or 1,000 Kbps) Upload speed does not impact streaming Ping of less than 150 milliseconds. Internet speeds are generally quoted in Megabits per second and download/upload speeds are generally measured in Kilobytes per second. The following points help it all make sense. We want to make sure you understand the results of your research. Overhead also applies to wireless and fibre connections cable access speeds are typically quoted after accounting for overhead. The remaining 15% is used by control information, also known as overhead, that ensures data packets go where they are supposed to, and in the correct order. You can also test directly to Skyway West at the Speedtest main page.įor ADSL speed tests, please realize the speed test statistics will report data transferring at about 85% of the speed your ADSL service sync’s up at. Use the dropdown menu at the bottom to test to Skyway West or other servers close to you. The basic test below (click on “GO”) tests upload and download internet speeds as well as the quality and performance of your connection. ![]()
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