Ideal line-rate time and an adjustable real-world estimate for this file and connection.
with 10% network overhead
Ideal line-rate time: 1m 20s
| Speed | Adjusted time |
|---|---|
| 10 Mbps | 1m 29s |
| 25 Mbps | 36s |
| 50 Mbps | 18s |
| 100 Mbps | 9s |
| 200 Mbps | 4s |
| 500 Mbps | 2s |
| 1000 Mbps | 1s |
Download time equals file size in bits divided by effective connection speed. 100 MB is 800 megabits using decimal SI units.
The ideal result assumes sustained line speed. The adjusted estimate reduces effective speed by the selected overhead percentage to represent protocol overhead and ordinary network loss. Server limits, Wi-Fi quality, and congestion can add more time.
Units reviewed July 2026 against the NIST SI reference.