THE NUMBERS, EXPLAINED
How to use this calculator.
Supported agreed policy uses floor number times usage multiplier. Ground-floor units have zero weight unless an agreed positive equivalent floor number is supplied.
Start with your inputs
Enter unit floor numbers, agreed usage multipliers, lift maintenance budget. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Unit floor numbers | 1,2,3 |
| Agreed usage multipliers | 1,1,2 |
| Lift maintenance budget | 900 |
A worked example
With the example inputs above, allocation weights is 1, 2, 6. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Allocation weights | 1, 2, 6 |
| Unit charges | 100, 200, 600 |
How this is calculated
Allocation weights
Multiply each floor index by its agreed usage multiplier.
Unit charges
Normalize weights to total maintenance budget.
Symbols and units
- a
- Unit floor numbers
- b
- Agreed usage multipliers
- c
- Lift maintenance budget
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
Supported agreed policy uses floor number times usage multiplier. Ground-floor units have zero weight unless an agreed positive equivalent floor number is 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?
Allocation weights; Unit charges. 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: Supported agreed policy uses floor number times usage multiplier. Ground-floor units have zero weight unless an agreed positive equivalent floor number is 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: 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.
Read the quality report →