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Backup Time Calculator

Estimate backup duration from data size and real transfer speed.

Real backup speed depends on disks, network, software, small files and encryption.

Notes and next steps

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How it works

Estimate backup duration from data size and real transfer speed.

Estimating method: Seconds = data size in MB รท transfer speed in MB/s.

Worked example

500 GB is about 500,000 MB. At 80 MB/s, it takes about 6250 seconds, or 1 hour 44 minutes.

Common mistakes
  • Ignoring small-file overhead.
  • Using peak speed instead of sustained speed.
  • Forgetting verification/encryption time.
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