THE NUMBERS, EXPLAINED
How to use this calculator.
This arithmetic estimate does not round each transaction fee to pennies; actual processor settlement can differ.
Start with your inputs
Enter transaction amounts (£), percentage fee (%), fixed fee per transaction (£). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Transaction amounts (£) | 10,20,30 |
| Percentage fee (%) | 2 |
| Fixed fee per transaction (£) | 0.2 |
A worked example
With the example inputs above, total fees (£) is 1.8. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Total fees (£) | 1.8 |
| Net proceeds (£) | 58.2 |
How this is calculated
Total fees (£)
sum(a) × b ÷ 100+count(a) × c
Net proceeds (£)
sum(a) × (1-b ÷ 100)-count(a) × c
Symbols and units
- a
- Transaction amounts (£)
- b
- Percentage fee (%)
- c
- Fixed fee per transaction (£)
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Calculation steps and notation
sum(list) adds all entries in the list.
count(list) is the number of entries, including duplicates.
Assumptions and limits
This arithmetic estimate does not round each transaction fee to pennies; actual processor settlement can differ.
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?
Total fees (£); Net proceeds (£). 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: This arithmetic estimate does not round each transaction fee to pennies; actual processor settlement can differ.
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.
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.
Read the quality report →