Water Demand
Estimate water demand.
Project & Input Data
Your project criterion: enter the value from your governing code, specification or approved supplier data. No standard value is assumed.
Your project criterion: enter the value from your governing code, specification or approved supplier data. No standard value is assumed.
Your project criterion: enter the value from your governing code, specification or approved supplier data. No standard value is assumed.
Engineering Assumptions
Preliminary decision support
- The per-person consumption rate and peak factor are user-entered from the applicable code and facility type.
- A preliminary decision-support estimate: the result does not replace an approved design calculation or review by a competent authority.
- All percentages and inputs are user-defined; the calculation is purely arithmetic and assumes no particular code or specification.
Formula Summary
- Daily demand (L) = occupants × L/person/day + other
- Average flow (L/s) = daily demand ÷ (use hours × 3600)
- Peak flow (L/s) = average × peak factor
Results
Enter your data and press Calculate to see the results.
Engineering Insight
The per-person consumption rate varies sharply with the facility type; do not use a generic figure without documenting its source.
Recommended Action
Use the resulting peak flow as the basis for tank and pump design, cross-checked against your project's governing code.
Next step
This calculator is fully usable as it is. Professional adds saved projects, calculation history and PDF/Excel reports; Premium adds the integrated workflows and the BOQ generator.