Data transfer speed calculations

Assumptions: M = 1000 Mi = 1024

  • Kbps to KB/s: divide by 8*
  • Mbps to MB/s: divide by 8*
  • Kbps to KiB/s: divide by 8, divide by 1.024
  • KiB/s to MiB/h: multiply by 3600 then divide by 1024
  • KB/s to MB/h: multiply by 3600 then divide by 1000

This will provide a maximum theoretical transfer speed. Reasonable to factor in 10-20speeds. Uselful resources:

Flat rate data transfer volumes

  • Flat rate connections are constrained to the speed the client is paying for (eg 1 Mbps)
  • For many services 50% utilisation is a realistic maximum you would expect allowing for peak and off-peak usage periods.
  • Sample theoretical maximum data transfer per month

    Total data transfer per month (GB)

    Link speed

    100% utilisation

    80% utilisation

    50% utilisation

    256 Kbps

    83

    66.4

    41.5

    512 Kbps

    166

    132.80

    83

    1.024 Mbps

    332

    265

    166

    2.048 Mbps

    664

    531

    332

    5.12 Mbps

    1660

    1328

    830