THE NUMBERS, EXPLAINED
How to use this calculator.
Existing kits have no new purchase cost and are usable; shared kits are allocated to whole groups with one partial final group allowed.
Start with your inputs
Enter workshop participants, participants sharing each group kit, individual kits in stock, shared kits in stock, individual kit cost (currency), shared kit cost (currency). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Workshop participants | 24 |
| Participants sharing each group kit | 4 |
| Individual kits in stock | 10 |
| Shared kits in stock | 3 |
| Individual kit cost (currency) | 5 |
| Shared kit cost (currency) | 20 |
A worked example
With the example inputs above, individual kits to purchase is 14. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Individual kits to purchase | 14 |
| Shared kits to purchase | 3 |
| Purchase cost (currency) | 130 |
| Purchase cost per participant | 5.416667 |
How this is calculated
Individual kits to purchase
Provide one individual kit per participant.
Shared kits to purchase
Round participant groups up and deduct shared-kit stock.
Purchase cost (currency)
Price only missing individual and shared kits.
Purchase cost per participant
Spread purchases across participants, zero for an empty workshop.
Symbols and units
- a
- Workshop participants
- b
- Participants sharing each group kit
- c
- Individual kits in stock
- d
- Shared kits in stock
- e
- Individual kit cost (currency)
- f
- Shared kit cost (currency)
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
Existing kits have no new purchase cost and are usable; shared kits are allocated to whole groups with one partial final group allowed.
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?
Individual kits to purchase; Shared kits to purchase; Purchase cost (currency); Purchase cost per participant. 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: Existing kits have no new purchase cost and are usable; shared kits are allocated to whole groups with one partial final group allowed.
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 →