Download Time Calculator
Calculate how long a file takes to download at a given connection speed.
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Calculate Download Time
Estimated Download Time
1 minute 22 seconds
82 seconds total
0
Days
0
Hours
1
Minutes
22
Seconds
Same File at Different Speeds
| Connection | Speed | Download Time |
|---|
Context
1 GB
File Size
100 Mbps
Connection Speed
12.5 MB/s
Effective Transfer Rate
1%
of 100 GB Data Cap
Learn how it works:
File Sizes: Bits, Bytes, KB, MB & GB Explained
Enter a file size and your connection speed to get the download time. The one thing that catches everyone out: internet speeds are quoted in megabits per second (Mbps) while file sizes are in megabytes (MB), and there are 8 bits in a byte. A 100 Mbps connection moves at most 12.5 MB per second.
Download times at common speeds
| File size | 10 Mbps | 50 Mbps | 100 Mbps | 500 Mbps | 1 Gbps |
|---|---|---|---|---|---|
| 100 MB | 80 s | 16 s | 8 s | 1.6 s | 0.8 s |
| 1 GB | 13 min 20 s | 2 min 40 s | 80 s | 16 s | 8 s |
| 10 GB | 2 h 13 min | 26 min 40 s | 13 min 20 s | 2 min 40 s | 80 s |
| 100 GB | 22 h 13 min | 4 h 27 min | 2 h 13 min | 26 min 40 s | 13 min 20 s |
These are theoretical best cases with decimal units (1 GB = 8,000 Mb). Real downloads run 10–20% slower because of protocol overhead, Wi-Fi, and the server's own limits.
Convert units with the bits to bytes and data size converter tools, or work out what fits on a drive with the storage calculator.
Frequently Asked Questions
About 80 seconds in theory (1 GB = 8,000 megabits ÷ 100 Mbps), and typically 90–100 seconds in practice.
Mbps is megabits per second; MB/s is megabytes per second. Divide Mbps by 8 to get MB/s: a 200 Mbps line downloads at up to 25 MB/s.
Speed tests measure your line's peak; a real download is limited by the server, Wi-Fi signal, other devices on the network, and protocol overhead. 80–90% of the headline speed is normal.
Roughly 67 minutes at 100 Mbps, 13 minutes at 500 Mbps and 7 minutes at 1 Gbps, before real-world overhead.