THE NUMBERS, EXPLAINED
How to use this calculator.
Each gift represents one distinct eligible donor or an already combined donor total. Matching eligibility and donor/campaign caps are supplied.
Start with your inputs
Enter eligible donor gift amounts (currency), matching multiplier, maximum matching amount per donor (currency), remaining campaign matching pool (currency). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Eligible donor gift amounts (currency) | 100,300,600 |
| Matching multiplier | 1 |
| Maximum matching amount per donor (currency) | 200 |
| Remaining campaign matching pool (currency) | 500 |
A worked example
With the example inputs above, uncapped match request (currency) is 1,000. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Uncapped match request (currency) | 1,000 |
| Match request after per-donor caps (currency) | 500 |
| Campaign match payable (currency) | 500 |
| Campaign match shortfall after caps (currency) | 0 |
How this is calculated
Uncapped match request (currency)
Multiply all eligible gifts by the supplied match multiplier.
Match request after per-donor caps (currency)
Cap matching amount separately for each donor.
Campaign match payable (currency)
Apply the remaining campaign pool limit.
Campaign match shortfall after caps (currency)
Report capped donor requests beyond remaining matching funds.
Symbols and units
- a
- Eligible donor gift amounts (currency)
- b
- Matching multiplier
- c
- Maximum matching amount per donor (currency)
- d
- Remaining campaign matching pool (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
Each gift represents one distinct eligible donor or an already combined donor total. Matching eligibility and donor/campaign caps are supplied.
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?
Uncapped match request (currency); Match request after per-donor caps (currency); Campaign match payable (currency); Campaign match shortfall after caps (currency). 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: Each gift represents one distinct eligible donor or an already combined donor total. Matching eligibility and donor/campaign caps are supplied.
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 →