Bandwidth Calculator

Calculate file transfer time from size and connection speed.

Calculator Numbers & Math Updated Apr 20, 2026
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How to Use
  1. Enter a file size and connection speed.
  2. Pick matching units — result updates live.
Input
Transfer time

Formula

Transfer time
seconds = (size_MB × 8) / speed_Mbps
Bytes vs bits
1 byte = 8 bits — ISPs quote bits/s, files are bytes

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