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How long will a download or upload take?
Enter a file size and the speed available in that direction. The calculator separates the best-case line-rate time from a practical planning estimate.
Transfer calculator
Estimate a file transfer
Estimated download time
14 minutes 40 seconds- Ideal line-rate time
- 13 minutes 20 seconds
- Speed in MB/s
- 12.5 MB/s
This is an estimate, not a guarantee. Server limits, Wi-Fi, congestion, storage speed, and protocol behavior can make a real transfer slower.
The short formula
Convert the file to megabits, then divide by megabits per second. Decimal GB and binary GiB are different units, so the calculator handles each explicitly.
Why real transfers can take longer
A speed plan is not a promise that every server will deliver that rate. Wi-Fi, congestion, protocol overhead, storage speed, and the sending service can all lower the observed transfer speed.
Need the units explained first? Use the Mbps and MB/s converter. For the full calculation rules, read our methodology, or see how download-time estimates work.