How long does it take to download 2 TB at 100 Mbps?
1 day 20 hr 26 min Theoretical minimum at full line rate (12.5 MB/s), real downloads typically run 5–15% slower. Edit the calculator and this updates live.
Mbps vs MB/s, why the math says 1 day 20 hr 26 min
Internet plans are sold in megabits per second (Mbps, small b). File sizes are shown in megabytes (MB, big B). One byte is 8 bits, so a 100 Mbps connection moves at most 12.5 MB of file data per second, divide your plan speed by 8 to get the number your download manager shows.
That factor of 8 is why a "100 meg" plan doesn't download a 100 MB file in one second: it needs 8 seconds in theory, and a little more in practice once protocol overhead (typically 5–15%), Wi-Fi conditions, and server limits are counted.
time = (2 TB × 8 bits/byte) ÷ 100 Mbps = 1 day 20 hr 26 min
2 TB at every common speed
| Connection speed | Download time |
|---|---|
| 5 Mbps | 37 days 53 min |
| 10 Mbps | 18 days 12 hr 26 min |
| 25 Mbps | 7 days 9 hr 46 min |
| 50 Mbps | 3 days 16 hr 53 min |
| 100 Mbps (this page) | 1 day 20 hr 26 min |
| 200 Mbps | 22 hr 13 min 20 sec |
| 300 Mbps | 14 hr 48 min 53 sec |
| 500 Mbps | 8 hr 53 min 20 sec |
| 1 Gbps | 4 hr 26 min 40 sec |
Other file sizes at 100 Mbps
| File size | Download time |
|---|---|
| 100 MB | 8 sec |
| 250 MB | 20 sec |
| 500 MB | 40 sec |
| 1 GB | 1 min 20 sec |
| 2 GB | 2 min 40 sec |
| 5 GB | 6 min 40 sec |
| 10 GB | 13 min 20 sec |
| 20 GB | 26 min 40 sec |
| 50 GB | 1 hr 6 min 40 sec |
| 100 GB | 2 hr 13 min 20 sec |
| 250 GB | 5 hr 33 min 20 sec |
| 500 GB | 11 hr 6 min 40 sec |
| 1 TB | 22 hr 13 min 20 sec |
| 2 TB (this page) | 1 day 20 hr 26 min |
Frequently asked questions
How long does 2 TB really take at 100 Mbps?
The theoretical minimum is 1 day 20 hr 26 min. Real downloads lose 5–15% to protocol overhead, Wi-Fi conditions, and server throttling, so plan on roughly 2 days 53 min to 2 days 3 hr 6 min.
What is 100 Mbps in MB/s?
100 megabits per second equals 12.5 megabytes per second (divide by 8, because one byte is 8 bits). Your download manager reports MB/s, which is why the number looks smaller than your plan speed.
What speed do I need to download 2 TB in under 10 minutes?
At least 26,667 Mbps of real throughput. Add ~10% headroom for overhead when choosing a plan.
How long would 2 TB take on gigabit (1 Gbps)?
4 hr 26 min 40 sec, about 10× faster than 100 Mbps.