Examples
Examples
Try the starting example
- People
- 5
- Utensil items per person per meal
- 3
- Meal services to wash separately
- 3
- Items per wash batch
- 8
- Supplied wash water per batch (L)
- 2
- Supplied rinse water per item (L)
- 0.05
- Wash batches
- 6
- Total utensil items handled
- 45
- Wash water (L)
- 12
- Rinse water (L)
- 2.25
- Combined water quantity (L)
- 14.25
Try another scenario
- People
- 4
- Utensil items per person per meal
- 3
- Meal services to wash separately
- 3
- Items per wash batch
- 8
- Supplied wash water per batch (L)
- 2
- Supplied rinse water per item (L)
- 0.05
- Wash batches
- 6
- Total utensil items handled
- 36
- Wash water (L)
- 12
- Rinse water (L)
- 1.8
- Combined water quantity (L)
- 13.8
Calculation method
Calculation method
Wash batches
Round up people×items per person / batch capacity for EACH meal, then multiply by meals. Do not combine dirty items across meals.
Total utensil items handled
People × items per person × meals.
Wash water (L)
Wash batches × supplied wash water per batch.
Rinse water (L)
Total items × supplied rinse water per item.
Combined water quantity (L)
Wash + rinse water.
Symbols and units
- a
- People
- b
- Utensil items per person per meal
- c
- Meal services to wash separately
- d
- Items per wash batch
- e
- Supplied wash water per batch (L)
- f
- Supplied rinse water per item (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 & limits
Assumptions & limits
- A quantity ledger using your chosen wash process, batch size and water amounts. It does not specify sanitation practice, wastewater disposal or drinking-water adequacy.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
OpenStax: arithmetic and geometry ↗
Background reading; this does not imply endorsement or independent review of SumFizz.