THE NUMBERS, EXPLAINED
How to use this calculator.
Apply discounts in sequence. Two discounts of 10% and 20% produce a 28% reduction, not 30%.
Start with your inputs
Enter original price (£), discounts (%), separated by commas. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Original price (£) | 100 |
| Discounts (%), separated by commas | 10,20 |
A worked example
With the example inputs above, final price (£) is 72. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Final price (£) | 72 |
How this is calculated
Final price (£)
Start at a. For each percentage x in b, multiply the current price by (1 − x/100).
Symbols and units
- a
- Original price (£)
- b
- Discounts (%), separated by commas
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
Apply discounts in sequence. Two discounts of 10% and 20% produce a 28% reduction, not 30%.
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?
Final price (£). 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: Apply discounts in sequence. Two discounts of 10% and 20% produce a 28% reduction, not 30%.
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
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.
Read the quality report →