Download Time Calculator
How to work out download time
- Enter the file size and its unit.
- Enter your connection speed and its unit.
- Keep 10% overhead or change it to see how long the transfer takes.
Frequently asked questions
Why is a 100 Mbps connection not 100 MB/s?
Connection speeds are in megabits and file sizes in megabytes; one byte is eight bits, so 100 Mbps is at most 12.5 MB/s.
Why add overhead?
Protocol headers, resent packets and a busy network make real transfers slower than the line speed. 10% is a common allowance.
How long does a 4 GB file take at 100 Mbps?
About 5 minutes 20 seconds at full speed (32,000 megabits ÷ 100), or just under 6 minutes with 10% overhead.
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