How Long Does It Take to Download 5 GB at 100 Mbps?
Downloading 5 GB at 100 Mbps takes about 7 minutes 9 seconds under ideal conditions — expect roughly 8 minutes 57 seconds to 14 minutes 19 seconds in practice.
Why the real-world time is longer
A 5 GB file contains about 42.9 gigabits of data. At the full 100 Mbps line rate that transfers in 7 minutes 9 seconds. Real download speeds, however, usually reach only 50–80% of the advertised rate because of protocol overhead, Wi-Fi conditions, network congestion, and limits on the other end of the connection — which is why a realistic estimate for this transfer is 8 minutes 57 seconds to 14 minutes 19 seconds. Press Calculate above to test your own numbers.