THE NUMBERS, EXPLAINED
How to use this calculator.
Effort is hours times agreed multiplier. Positive balance means contribution above the household’s target share of total effort.
Start with your inputs
Enter care hours by household, agreed effort multiplier, agreed target share weights. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Care hours by household | 10,20 |
| Agreed effort multiplier | 2,1 |
| Agreed target share weights | 1,1 |
A worked example
With the example inputs above, weighted effort by household is 20, 20. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Weighted effort by household | 20, 20 |
| Balance against target effort | 0, 0 |
How this is calculated
Weighted effort by household
Multiply each household’s care hours by agreed effort weight.
Balance against target effort
Subtract target share of total effort from actual weighted contribution.
Symbols and units
- a
- Care hours by household
- b
- Agreed effort multiplier
- c
- Agreed target share weights
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
Effort is hours times agreed multiplier. Positive balance means contribution above the household’s target share of total effort.
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?
Weighted effort by household; Balance against target effort. 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: Effort is hours times agreed multiplier. Positive balance means contribution above the household’s target share of total effort.
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: Solve proportions and their applications ↗
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.
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