The short answer
Transfer time is file size in bits divided by speed in bits per second. Real transfers are usually slower, so this calculator can add a practical overhead allowance.
Upload & Download Time Calculator
Estimate upload or download time from file size and connection speed, with protocol overhead and decimal or binary units.
Estimated transfer time1 minute 32 secondsAt an effective rate of 11.25 MB/s
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Designed for temporary work
File results are stored outside direct public access and use a session-bound link. They expire after 60 minutes. Calculator inputs stay in your browser and are not uploaded.
Common questions
Why is the real transfer slower?
Wi-Fi conditions, network congestion, encryption, protocol overhead, and server limits can reduce usable speed.
Does Mbps mean megabytes per second?
No. Mbps is megabits per second. Divide by eight to estimate MB/s before overhead.