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:

• http://en.wikipedia.org/wiki/Megabyte

• http://www.numion.com/Calculators/Units.html

• http://www.numion.com/Calculators/Time.html

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