Verify the inputs
Measure or document each input. If a value is only an estimate, record its source and test a conservative alternative.
Wells & water/ CALCULATOR
Well supply and peak-demand buffer
Compare a measured source flow and usable stored water with one defined period of peak household demand.
FROM ESTIMATE TO ACTION
Use the result, not just the number.
Keep the calculation traceable
Save the input link or copied result together with the date, units and assumptions. A number without its inputs cannot be checked later.
Confirm the decision
Compare the estimate with the related guide, current product data and requirements that apply at your location before buying or building.
Inputs to verify
- Nominal storage volume (L)
- Use the working capacity of the storage vessel before applying the protected reserve below.
- Protected storage reserve (%)
- Keep a deliberate reserve for controls, sediment, water quality or operational uncertainty.
- Available source flow (L/min)
- Use a defensible sustained supply rate for the event, not a brief recovery observation.
- Peak household demand (L/min)
- Combine only the fixtures and uses expected to overlap during this event.
- Peak-demand duration (min)
- Choose a real operating period such as a morning peak, irrigation block or tank refill.