THE NUMBERS, EXPLAINED
How to use this calculator.
Same entered weekly load mix for two supplied program-water scenarios; excludes supply leaks and other household water.
Start with your inputs
Enter weekly loads by program, option a water per load (l), option b water per load (l). Keep amounts in the units shown on each field. The example is a starting point, not a recommended value.
| Input | Example value |
|---|---|
| Weekly loads by program | 3,2 |
| Option A water per load (L) | 40,60 |
| Option B water per load (L) | 30,45 |
A worked example
With the example inputs above, option a weekly water (l) is 240. Change the inputs to explore your own scenario.
| Result | Example answer |
|---|---|
| Option A weekly water (L) | 240 |
| Option B weekly water (L) | 180 |
| Weekly reduction (L) | 60 |
How this is calculated
Option A weekly water (L)
Sum weekly load count times water per load for option A.
Option B weekly water (L)
Repeat for option B.
Weekly reduction (L)
Subtract option B water use from option A.
Symbols and units
- a
- Weekly loads by program
- b
- Option A water per load (L)
- c
- Option B water per load (L)
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
Same entered weekly load mix for two supplied program-water scenarios; excludes supply leaks and other household water.
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?
Option A weekly water (L); Option B weekly water (L); Weekly reduction (L). 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: Same entered weekly load mix for two supplied program-water scenarios; excludes supply leaks and other household water.
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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