Mbps to MB/s converter

Type a speed with its unit, like `100 Mbps`, `12.5 MB/s` or `1 Gbps`, and it appears in every unit with a copy button for each. A number on its own is read as Mbps. It understands `Mbit/s`, `Mb/s` and `megabits per second` as well as `Mbps`.

Show first puts the unit you care about at the top. To turn a speed into a time for a particular file, the download time calculator takes it from there.

Mbps is megabits a second; MB/s is megabytes a second. A byte is 8 bits, so 100 Mbps is 100 ÷ 8 = 12.5 MB/s, and a gigabit line tops out at 125 MB/s.

Internet providers sell in bits, and have since modems were rated in bits a second. Browsers and download managers mostly show bytes a second, the unit file sizes are in. The two numbers for the same connection differ by a factor of eight, and that's the usual reason a download looks slower than the advertised speed.

Some programs count in 1,024s: their "MB/s" is mebibytes a second, about 4.9% bigger than a megabyte. 100 Mbps is 12.5 MB/s but only 11.92 MiB/s. If your download manager shows a little under an eighth of your line speed even on a perfect connection, that may be all it is. The MB to GB converter explains the two systems.

A real download will also lose some speed to protocol overhead, Wi-Fi and the server at the other end. The conversion here is the arithmetic, not a prediction.