THE NUMBERS, EXPLAINED
How to use this calculator.
Scenario arithmetic only; constant baseline and uplift, timely receipts, no spoilage or demand estimation.
Start with your inputs
Enter baseline daily demand (units), assumed promotion uplift (%), promotion days, usable stock before promotion, confirmed receipts during promotion. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Baseline daily demand (units) | 100 |
| Assumed promotion uplift (%) | 50 |
| Promotion days | 4 |
| Usable stock before promotion | 200 |
| Confirmed receipts during promotion | 100 |
A worked example
With the example inputs above, promotion demand (units) is 600. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Promotion demand (units) | 600 |
| Additional order (units) | 300 |
| Incremental demand above baseline | 200 |
How this is calculated
Promotion demand (units)
Scale baseline demand by uplift and duration.
Additional order (units)
Deduct usable stock and confirmed receipts, then round up.
Incremental demand above baseline
Compute demand attributable to the supplied uplift.
Symbols and units
- a
- Baseline daily demand (units)
- b
- Assumed promotion uplift (%)
- c
- Promotion days
- d
- Usable stock before promotion
- e
- Confirmed receipts during promotion
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
Scenario arithmetic only; constant baseline and uplift, timely receipts, no spoilage or demand estimation.
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?
Promotion demand (units); Additional order (units); Incremental demand above baseline. 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: Scenario arithmetic only; constant baseline and uplift, timely receipts, no spoilage or demand estimation.
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: Describe and Identify Cost Drivers ↗
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 →