Data transfer cost calculator
Egress is the line item that surprises people. It is priced per gigabyte and it adds up quietly.
GB
GB
%
Monthly cost
171.00
- Annual cost at this volume
- 2052.00
- Billable volume
- 1900.0 GB
- Volume in twelve months
- 3592 GB
- Monthly cost by then
- 314.25
- Effective price per GB
- 0.085 50
Show the working
- Monthly egress = 2000
- Price per GB = 0.09
- Free allowance = 100
- Monthly growth = 5
- Billable volume = max(2000 - 100, 0) = 1900
- Monthly cost = 1900 * 0.09 = 171
- Annual cost at this volume = 171 * 12 = 2052
- Volume in twelve months = 2000 * (1 + 5/100)^12 = 3591.71
- Monthly cost by then = max(3591.71 - 100, 0) * 0.09 = 314.254
- Effective price per GB = 2000 > 0 ? 171 / 2000 : 0 = 0.0855
Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.
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The formula
- cost = max(volume - free allowance, 0) x price per GB