THE NUMBERS, EXPLAINED
How to use this calculator.
Usage is metered; standing charge is distributed under supplied weights. The tool does not determine legal allocation rules.
Start with your inputs
Enter unit heat usage (kwh), energy price (currency/kwh), building standing charge, standing-charge weights. Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Unit heat usage (kWh) | 100,300 |
| Energy price (currency/kWh) | 0.1 |
| Building standing charge | 60 |
| Standing-charge weights | 1,2 |
A worked example
With the example inputs above, usage charges by unit is 10, 30. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Usage charges by unit | 10, 30 |
| Complete unit bills | 30, 70 |
| Reconciled total | 100 |
How this is calculated
Usage charges by unit
Multiply each unit usage by energy price.
Complete unit bills
Add the weighted standing-charge share.
Reconciled total
Add metered energy cost and building standing charge.
Symbols and units
- a
- Unit heat usage (kWh)
- b
- Energy price (currency/kWh)
- c
- Building standing charge
- d
- Standing-charge 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
Usage is metered; standing charge is distributed under supplied weights. The tool does not determine legal allocation rules.
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?
Usage charges by unit; Complete unit bills; Reconciled total. 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: Usage is metered; standing charge is distributed under supplied weights. The tool does not determine legal allocation rules.
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 →