Bandwidth calculator
Estimate transfer time from file size, link speed and protocol efficiency.
Get started
- Use the example values or enter your own measurements.
- Calculate, then copy the result or download the available details.
Example
Input
1 GB at 100 Mbps, efficiency 100%Expected result
80 secondsGood to know
The calculation runs in your browser. Use consistent units in fields with no explicit unit.
Calculation method
Time in seconds = file bytes × 8 ÷ effective bits per second. Network prefixes are decimal. File size supports decimal and binary prefixes.