THE NUMBERS, EXPLAINED
How to use this calculator.
Uses your supplied flat per-region rates and free allowances; unused regional allowances do not transfer. Request fees are prorated, not rounded up in blocks. No live provider pricing, tiered pricing, currency conversion or tax is included.
Start with your inputs
Enter traffic by region (decimal gb), price per gb by region (£), free gb for each region, requests, price per 10,000 requests (£), fixed fee (£). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Traffic by region (decimal GB) | 100,200 |
| Price per GB by region (£) | 0.1,0.2 |
| Free GB for each region | 10,20 |
| Requests | 1000000 |
| Price per 10,000 requests (£) | 0.01 |
| Fixed fee (£) | 5 |
A worked example
With the example inputs above, regional egress charges (£) is 9, 36. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Regional egress charges (£) | 9, 36 |
| Total egress charge (£) | 45 |
| Request charge (£) | 1 |
| Total scenario invoice (£) | 51 |
How this is calculated
Regional egress charges (£)
For each region: max(traffic − regional free allowance, 0) × price per GB.
Total egress charge (£)
Sum regional egress charges.
Request charge (£)
Requests ÷ 10,000 × supplied request price.
Total scenario invoice (£)
Egress plus request charge plus fixed fee.
Symbols and units
- a
- Traffic by region (decimal GB)
- b
- Price per GB by region (£)
- c
- Free GB for each region
- d
- Requests
- e
- Price per 10,000 requests (£)
- f
- Fixed fee (£)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions and limits
Uses your supplied flat per-region rates and free allowances; unused regional allowances do not transfer. Request fees are prorated, not rounded up in blocks. No live provider pricing, tiered pricing, currency conversion or tax is included.
Calculations use the values you enter. Blank or invalid inputs show an error instead of silently substituting zero. Results are displayed to useful precision; calculations retain the underlying numeric precision.
Questions about this tool
What does the result tell me?
Regional egress charges (£); Total egress charge (£); Request charge (£); Total scenario invoice (£). The result applies to the method and inputs described above. Check the units and assumptions before using it in a decision.
Why might another calculator differ?
Differences in units, rounding, timing or model definitions can produce different answers. Compare the input definitions and the method, rather than only the final number. For this tool: Uses your supplied flat per-region rates and free allowances; unused regional allowances do not transfer. Request fees are prorated, not rounded up in blocks. No live provider pricing, tiered pricing, currency conversion or tax is included.
Are my inputs stored or sent to AI?
Calculations on this page happen in your browser. The separate AI question finder sends its submitted conversation to OpenAI; these calculator fields are not sent. Favourites and recent tool names are stored locally. A shared link contains the inputs you choose to include.
Further reading
OpenStax: percentages and proportions ↗
Background reading; this does not imply endorsement or independent review of SumFizz.
Review status
Software example and browser checks are recorded in our quality report. No external expert review is claimed. Created with coding assistance; calculations run as ordinary browser code.
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