c+CalcLantern

File download time

Estimate transfer time from file size and effective bandwidth.

How this works

Time = file bytes × 8 / effective bits per second.

Example

Using the example inputs, transfer time is 8.333333 minutes.

File size
5 GB (decimal)
Connection speed
100 Mbit/s
Effective throughput
80 %
Transfer time
8.333333 minutes

Scope and assumptions

Decimal GB and Mbit/s; no network measurement. Server limits, congestion, and setup time may add delay.

OpenStax mathematics reference

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