Download Time Calculator
Seconds = file size in MB × 8 ÷ speed in Mbps
Estimate file download time from decimal megabytes and megabits per second.
Formula
Seconds = file size in MB × 8 ÷ speed in Mbps
Worked example
File size: 1000 MB
Download speed: 100 Mbps
With these inputs, the result is 80 s.
How to use this calculator
- Identify the quantity you want to calculate.
- Enter your measurements in the units shown on each field.
- Read the result, which updates as you change the inputs.
- Check the assumptions below before applying the result.
Assumptions and limits
Protocol overhead, congestion, and changing transfer rates are excluded.
Precision and checking
Results are rounded for display. Use the most accurate measurements available, and avoid rounding your inputs unnecessarily. Extra decimal places in a result do not make an estimate more reliable.
To check a result, substitute the same input values into the formula shown above. Change one value at a time to understand how the quantity responds.
Frequently asked questions
What assumptions does this calculation use?
Protocol overhead, congestion, and changing transfer rates are excluded.
Are my inputs sent to a server?
No. The calculation runs locally in your browser. The result updates as you edit the inputs.
