How Long Does It Take to Download 5 GB at 25 Mbps?
Downloading 5 GB at 25 Mbps takes about 28 minutes 38 seconds under ideal conditions — expect roughly 35 minutes 47 seconds to 57 minutes 16 seconds in practice.
Why the real-world time is longer
A 5 GB file contains about 42.9 gigabits of data. At the full 25 Mbps line rate that transfers in 28 minutes 38 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 35 minutes 47 seconds to 57 minutes 16 seconds. Press Calculate above to test your own numbers.