How it works
Uses decimal gigabytes (1 GB = 1,000 MB) and megabits. An efficiency factor models protocol overhead. Network fluctuation is not predictable.
FormulaSeconds = file size (GB) × 8,000 ÷ effective download speed (Mbps).
TECHNOLOGY / INTERNET
← All toolsFile download time
Find how long a download may take at a given internet connection speed.
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File download time: a worked example
With file size (gb) 12, download speed (mbps) 100, effective speed (%) 85, the estimated download time is 18m 49s.
| File size (GB) | 12 |
|---|---|
| Download speed (Mbps) | 100 |
| Effective speed (%) | 85 |
| Estimated download time | 18m 49s |
|---|---|
| Effective speed | 85 Mbps |
| Estimated minutes | 18.8 min |
Amounts are shown in US dollars for illustration. Choose your own currency in the calculator above; it labels amounts and does not convert them.
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Modelled results are estimates. Independently check decisions involving health, finances or safety.
Frequently asked questions
How is the file download time calculated?
Seconds = file size (GB) × 8,000 ÷ effective download speed (Mbps). Uses decimal gigabytes (1 GB = 1,000 MB) and megabits. An efficiency factor models protocol overhead. Network fluctuation is not predictable.
What does the file download time example show?
With file size (gb) 12, download speed (mbps) 100, effective speed (%) 85, the estimated download time is 18m 49s. Effective speed: 85 Mbps; Estimated minutes: 18.8 min.
What assumptions and limits apply?
This is an estimate based on the inputs and assumptions shown on this page, not professional advice. Check anything with financial, health or safety consequences independently.
Is my data private?
Yes. Calculations run in your browser and your numbers are not sent to a server. A share link contains the inputs you choose to share, so check it before sending it to anyone.