Download Time
How long a file takes at any connection speed.
10 GB = 10,000,000,000 bytes = 80,000,000,000 bits at 50 Mbps (6.3 MB/s effective) time = bits รท speed = 1,600 seconds โ 26 minutes 40 seconds
Ideal transfer โ real-world speeds are typically 10โ30% lower due to overhead. 1 byte = 8 bits, which is why a "100 Mbps" line downloads at ~12.5 MB/s.
About the Download Time
Estimate how long a file takes to download or upload at any connection speed. Sizes accept both decimal units (KB, MB, GB, TB) and binary units (KiB, MiB, GiB), the speed is entered in Mbps or picked from presets from 5 Mbps ADSL to USB 3.0, and the math shown is bits divided by speed.
How to use the Download Time
- Enter the file or data size and choose its unit, such as GB or GiB.
- Type a connection speed in Mbps, or pick a preset like Fast fiber โ 500 Mbps.
- Read the Transfer time tile in human-readable duration.
- Open the Detail box for the bytes, bits and formula used.
Download Time FAQ
Why does 100 Mbps not mean 100 MB per second?
Connection speeds are in bits while file sizes are in bytes โ 8 bits per byte โ so a 100 Mbps line moves about 12.5 MB/s, which the Throughput tile shows directly.
Is the estimate optimistic?
Slightly. It assumes an ideal connection; real transfers typically run 10 to 30 percent slower due to protocol overhead, as noted under the result.
Which size units should I use?
Pick the one that matches your source: operating systems and file managers report binary units like MiB and GiB, while drive makers and network tools use decimal MB and GB.