Game Download Time Calculator
Estimate real-world game download times from your connection speed and the install size, including the protocol overhead that makes every download slower than the marketing number.
Realistic time
3h 08m
What you should actually plan for
Theoretical best
2h 40m
If you hit 100% of your line speed
Effective throughput
10.6MB/s
What the download window will show
How to get the number that matters
Do not enter the speed on your bill. Run a speed test, take the download figure, and enter that. The gap between the two is often substantial, especially on cable and older DSL connections during evening peak hours.
What the efficiency slider is doing
A download never runs at 100% of your line speed. TCP overhead, the handshake, packet retransmissions and the game platform’s own server capacity all take a cut. In practice:
- 90–95% — wired connection, off-peak, a well-provisioned CDN like Steam
- 80–90% — the normal case, and the default here
- 50–70% — Wi-Fi at range, or a launch-day patch where everyone is downloading at once
- Under 50% — something is wrong; check for another device saturating the line, or a background console download
The bottleneck people forget
On a fast connection, your storage becomes the limit. Modern installers decompress as they download, and on a mechanical hard drive that write and unpack cycle caps out somewhere around 100–150 Mbps regardless of how fast your internet is. If you have gigabit fibre and your downloads crawl, check whether the game is installing to an HDD.
Consoles have their own version of this problem: the PS5 and Xbox Series consoles both throttle downloads heavily while a game is running in the foreground. Fully close the game — do not just minimise it — and the download speed frequently triples.
Common questions
Why is my download slower than my internet speed?+
Three reasons stack up. Protocol overhead eats roughly 5–10% before anything else. The game’s content servers may be throttling you or serving thousands of other people the same patch. And the download has to be written to disk and often decompressed as it arrives, which on a slow HDD becomes the actual bottleneck rather than your connection.
Is Mbps the same as MB/s?+
No, and this is the single most common source of confusion. Your ISP sells megabits per second (Mbps); your download window shows megabytes per second (MB/s). There are 8 bits in a byte, so a 100 Mbps connection tops out at about 12.5 MB/s. If your 100 Mbps line is downloading at 11 MB/s, it is working correctly.
Does a wired connection download faster than Wi-Fi?+
Usually, and the gap widens the faster your plan is. On a 50 Mbps connection, decent Wi-Fi keeps up fine. On a 900 Mbps line, most Wi-Fi setups deliver a fraction of it. If you are on gigabit and downloading at 200 Mbps, plug in an Ethernet cable before you blame the game.
Why does the console say a different time?+
Consoles estimate from the throughput of the last few seconds, so the figure swings wildly whenever the speed changes. This calculator gives you a steady-state estimate based on your actual line speed, which is more useful for deciding whether to wait up or go to bed.
All calculations run locally in your browser.
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