How Long Does It Take to Upload 100 GB at 1 Gbps?
Uploading 100 GB at 1 Gbps takes about 14 minutes 19 seconds under ideal conditions — expect roughly 17 minutes 54 seconds to 28 minutes 38 seconds in practice.
Why the real-world time is longer
A 100 GB file contains about 859 gigabits of data. At the full 1 Gbps line rate that transfers in 14 minutes 19 seconds. Real upload 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 17 minutes 54 seconds to 28 minutes 38 seconds. Press Calculate above to test your own numbers.