Internet speed is sold in megabits per second (Mbps) but files are stored in megabytes (MB) . There are 8 bits in a byte, so a 100 Mbps line downloads at roughly 12.5 MB/s in real conditions. Use the converter below to translate any plan speed into practical units.
Even on a clean Ethernet connection you'll see 10-15% lower than the advertised number, due to TCP/IP overhead, framing, and retransmissions. Add WiFi to the mix and you can lose another 30-50%.