How Long Does It Take to Upload 1 GB at 1 Gbps?
Uploading 1 GB at 1 Gbps takes about 9 seconds under ideal conditions — expect roughly 11 seconds to 17 seconds in practice.
Why the real-world time is longer
A 1 GB file contains about 8.6 gigabits of data. At the full 1 Gbps line rate that transfers in 9 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 11 seconds to 17 seconds. Press Calculate above to test your own numbers.