Data Transfer Time Calculator
Estimate file transfer duration after applying an entered useful-throughput fraction.
Your result
EVERYDAYEnter your values and select calculate.
On this page How it works & practical examples
How to use the Data Transfer Time Calculator
GB means one billion bytes and Mbps means one million bits per second. Supply your expected useful throughput percentage rather than assuming the advertised bit rate is achieved.
The calculation
Worked example
A 10 decimal GB file at 100 Mbps with 80% useful throughput takes 1,000 seconds, or 16.6667 minutes.
Assumptions and limits
No live connection speed is measured. Setup time, outages, compression and changing congestion are excluded; upload and download rates can differ.
Common questions
Which inputs should I use?
GB means one billion bytes and Mbps means one million bits per second. Supply your expected useful throughput percentage rather than assuming the advertised bit rate is achieved.
What does the result exclude?
No live connection speed is measured. Setup time, outages, compression and changing congestion are excluded; upload and download rates can differ.