How Long to Upload 5 GB at 100 Mbps?

With a 100 Mbps upload connection, a 5 GB file takes approximately 6m 50s under ideal conditions.

Why does a 5 GB upload take 6m 50s at 100 Mbps?

Upload speed is measured in megabits per second (Mbps), while file size is measured in megabytes (MB) or gigabytes (GB). Since 1 byte = 8 bits, you divide your file's size in megabytes by your speed in megabits, then multiply by 8 to get the transfer time in seconds.

For 5 GB (5,120 MB) at 100 Mbps: 5,120 MB × 8 ÷ 100 Mbps = 410 seconds ≈ 6m 50s

In practice, network overhead, protocol headers, and ISP throttling reduce effective throughput to about 80% of your advertised speed — making the realistic upload time closer to 8m 32s. If you're on Wi-Fi instead of Ethernet, expect even longer due to signal interference.

5 GB upload time at different speeds

Different file sizes at 100 Mbps

Upload 5 GB at other speeds

Other file sizes at 100 Mbps