How long does it take to download 100 GB?
At 100 Mbps, 100 GB takes at least 8,000 seconds (2 h 13 min 20 s); at 300 Mbps about 44 minutes, and at 1 Gbps 13 min 20 s. 100 GB is 800,000 megabits, so divide 800,000 by your speed in Mbps to get seconds.
How long 100 GB takes at common speeds
| Plan | At full speed | Typical (≈90%) |
|---|---|---|
| 25 Mbps | 8 hours, 53 minutes, 20 seconds | 9 hours, 52 minutes, 36 seconds |
| 50 Mbps | 4 hours, 26 minutes, 40 seconds | 4 hours, 56 minutes, 18 seconds |
| 100 Mbps | 2 hours, 13 minutes, 20 seconds | 2 hours, 28 minutes, 9 seconds |
| 200 Mbps | 1 hour, 6 minutes, 40 seconds | 1 hour, 14 minutes, 4 seconds |
| 300 Mbps | 44 minutes, 27 seconds | 49 minutes, 23 seconds |
| 500 Mbps | 26 minutes, 40 seconds | 29 minutes, 38 seconds |
| 1 Gbps | 13 minutes, 20 seconds | 14 minutes, 49 seconds |
| 2 Gbps | 6 minutes, 40 seconds | 7 minutes, 24 seconds |
Typical assumes about 90% of the plan speed arrives as file data (protocol overhead and real-world losses). The server, Wi-Fi and disk also have to keep up.
Time to download 100 GB at common plan speeds
Typical assumes about 90% of the plan speed arrives as file data (protocol overhead and real-world losses). The server, Wi-Fi and disk also have to keep up.
Reading the table and chart
The table above gives two times for each plan: the ideal case at the full plan speed, and a typical case at about 90%, which is what a good wired connection delivers once protocol overhead is counted. The chart draws the typical times for five common plans.
Two things stand out. First, time falls in proportion to speed, so each doubling halves the wait, but the minutes saved shrink as you go up: going from 100 to 300 Mbps saves almost an hour and a half per 100 GB at full speed, while going from 1 Gbps to 2 Gbps saves under seven minutes. Second, at 1 Gbps and above, the plan is rarely the limit any more. A wired gigabit test typically tops out near 940 Mbps (100 GB in about 14 min 11 s), and at 2 Gbps the data would have to arrive at 250 MB/s, which the download server, the device's network port and its storage all have to sustain.
The formula, and the speed for a deadline
seconds = GB × 8,000 ÷ Mbps 100 GB at 250 Mbps = 800,000 ÷ 250 = 3,200 s = 53 min 20 s
Turn it around to find the speed that finishes a download in time, for example before a game night or overnight:
Mbps needed = GB × 8,000 ÷ seconds
| Finish 100 GB within | Speed needed (full rate) | At 90% efficiency |
|---|---|---|
| 8 hours (overnight) | 27.8 Mbps | 30.9 Mbps |
| 2 hours | 111.1 Mbps | 123.5 Mbps |
| 1 hour | 222.2 Mbps | 246.9 Mbps |
| 30 minutes | 444.4 Mbps | 493.8 Mbps |
| 15 minutes | 888.9 Mbps | 987.7 Mbps |
Even a modest plan finishes 100 GB overnight; 15 minutes needs a gigabit connection working flat out. The download time calculator handles any other size, speed or efficiency.
Reading Steam and console download screens
Game launchers usually show megabytes per second, while your plan is in megabits. Multiply the launcher figure by 8 before comparing, or work in bytes throughout: 100 GB is 100,000 MB, so seconds = 100,000 ÷ MB/s.
- Steam at 30 MB/s on a 300 Mbps plan. 30 × 8 = 240 Mbps, 80% of the plan. The 100 GB game takes 100,000 ÷ 30 ≈ 3,333 s, about 55 min 33 s.
- Steam at 110 MB/s on gigabit. 880 Mbps: a full-speed connection. About 15 min 9 s for 100 GB.
- A console showing a number without an obvious unit. Console download screens differ by model and software version. Check whether the label is Mb/s (bits) or MB/s (bytes); the two differ by 8.
Steam download speed explains why the launcher sometimes shows less than your plan even when the line is fine.
Why a 100 GB game takes longer than the table
- The download server. Stores and update services decide how fast they send. On launch days, many players pull the same files at once.
- Your own drive. The download has to be written to disk as it arrives, so a slow or nearly full drive is worth ruling out when everything else checks out.
- Installing after downloading. Many games verify and install after the transfer finishes, so the time until you can play is longer than the download.
- Wi-Fi. A console in another room on Wi-Fi often gets a fraction of the plan. A cable is the single biggest fix.
- Sharing the line. Two big downloads at once each get about half the speed.
Faster ways to get 100 GB onto a device
Pre-loading a game before release day, or scheduling the download overnight, removes the wait entirely on almost any plan. If the game is already on another PC or console, copying it locally is often much faster than downloading: over USB 3.2 Gen 1 (5 Gbps nominal) 100 GB takes 160 seconds at the nominal rate, and even gigabit Ethernet between two machines matches a gigabit internet plan. The file transfer time calculator has presets for USB, Ethernet and Thunderbolt.
Going the other way is slower on most plans: uploading 100 GB, for example a video archive to a cloud drive, takes 11 h 6 min 40 s on a 20 Mbps upload. The upload time calculator works that out for any upload speed. For smaller files, see how long to download 10 GB; to convert a launcher reading in any unit, use the bytes to Mbps converter. Whether a faster plan is worth it for downloads like these is covered in is gigabit worth it?
Key takeaways
- 100 GB = 800,000 megabits, so seconds = 800,000 ÷ Mbps.
- 100 GB takes 2 h 13 min 20 s at 100 Mbps, 44 min 27 s at 300 Mbps and 13 min 20 s at 1 Gbps.
- Finishing overnight needs under 31 Mbps even at 90% efficiency; finishing in 15 minutes needs gigabit.
- Launchers show MB/s: multiply by 8 to compare with your plan.
- Above about 300 Mbps, check the store's servers, Wi-Fi and your own drive before blaming the plan.
Frequently asked questions
How long does 100 GB take at 50 Mbps?
16,000 seconds, which is 4 h 26 min 40 s at the full speed, or about 4 h 56 min at 90% efficiency.
How long does 100 GB take at 500 Mbps?
1,600 seconds, or 26 min 40 s at full speed; about 29 min 38 s at 90% efficiency.
How long does 100 GB take on gigabit?
800 seconds (13 min 20 s) at 1,000 Mbps. A wired gigabit connection typically tests around 940 Mbps, which gives about 14 min 11 s, if the server keeps up.
Why does my 100 GB game download take much longer than the calculation?
The store's servers, Wi-Fi and your own drive can all slow it down, and installation often continues after the download. Multiply the launcher's MB/s by 8 and compare it with your plan to see whether the connection is the limit.
Is it faster to copy a game from another console or PC?
Usually. A local copy over USB 3.2 or Ethernet does not depend on the internet or the store's servers; over gigabit Ethernet it is at least as fast as a gigabit internet download.
Sources
Related
Estimate how long a game, video or file takes to download at your internet speed.
Download 10 GBDownload times for 10 GB at common speeds, and the speed you need for a deadline.
Steam download speedConvert Steam's MB/s to Mbps, judge whether it's using your plan, and fix slow downloads.
Is gigabit worth it?Gigabit vs 300 and 500 Mbps: what changes, what does not, and who benefits.