How long does it take to download 100 GB at 10 Mbps?
22 hr 13 min 20 sec Theoretical minimum at full line rate (1.25 MB/s), real downloads typically run 5–15% slower. Edit the calculator and this updates live.
Mbps vs MB/s, why the math says 22 hr 13 min 20 sec
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 = (100 GB × 8 bits/byte) ÷ 10 Mbps = 22 hr 13 min 20 sec
100 GB at every common speed
| Connection speed | Download time |
|---|---|
| 5 Mbps | 1 day 20 hr 26 min |
| 10 Mbps (this page) | 22 hr 13 min 20 sec |
| 25 Mbps | 8 hr 53 min 20 sec |
| 50 Mbps | 4 hr 26 min 40 sec |
| 100 Mbps | 2 hr 13 min 20 sec |
| 200 Mbps | 1 hr 6 min 40 sec |
| 300 Mbps | 44 min 27 sec |
| 500 Mbps | 26 min 40 sec |
| 1 Gbps | 13 min 20 sec |
Other file sizes at 10 Mbps
| File size | Download time |
|---|---|
| 100 MB | 1 min 20 sec |
| 250 MB | 3 min 20 sec |
| 500 MB | 6 min 40 sec |
| 1 GB | 13 min 20 sec |
| 2 GB | 26 min 40 sec |
| 5 GB | 1 hr 6 min 40 sec |
| 10 GB | 2 hr 13 min 20 sec |
| 20 GB | 4 hr 26 min 40 sec |
| 50 GB | 11 hr 6 min 40 sec |
| 100 GB (this page) | 22 hr 13 min 20 sec |
| 250 GB | 2 days 7 hr 33 min |
| 500 GB | 4 days 15 hr 6 min |
| 1 TB | 9 days 6 hr 13 min |
| 2 TB | 18 days 12 hr 26 min |
Frequently asked questions
How long does 100 GB really take at 10 Mbps?
The theoretical minimum is 22 hr 13 min 20 sec. Real downloads lose 5–15% to protocol overhead, Wi-Fi conditions, and server throttling, so plan on roughly 1 day 26 min to 1 day 1 hr 33 min.
What is 10 Mbps in MB/s?
10 megabits per second equals 1.25 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 100 GB in under 10 minutes?
At least 1,334 Mbps of real throughput. Add ~10% headroom for overhead when choosing a plan.
How long would 100 GB take on gigabit (1 Gbps)?
13 min 20 sec, about 100× faster than 10 Mbps.