Water Demand Calculator
Estimate daily demand, peak demand, diversity effect, and storage requirement.
Open ToolPlumbing and Water Calculators
Water demand, pump head, NPSH, pressure drop, tanks, hot water, drainage pipe, and slope calculators.
Pump Head Calculator
Calculate static head, pressure head, friction loss, velocity, and total dynamic head.
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Drainage Pipe Sizing Assistant
Estimate drainage fixture units, pipe size guidance, and slope warning.
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Water Tank Capacity Planner
Calculate domestic tank volume, fire reserve separation, usable volume, and refill rate.
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Hot Water Demand Calculator
Estimate hot water storage, heating energy, recovery rate, and heater capacity.
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Water Pipe Pressure Drop Calculator
Estimate water pipe velocity, friction head, and pressure drop.
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Drainage Slope Calculator
Calculate pipe fall, slope percentage, and invert level difference.
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Pump Horsepower Calculator
Estimate pump power from flow, total dynamic head, efficiency, and motor margin.
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Water Pump NPSH Calculator
Calculate available NPSH, compare against pump NPSHr, and check cavitation margin.
Open ToolHow to use this collection
Start with the calculator closest to the project question, load the sample data, then replace values with your project assumptions. Use warnings and methodology notes to decide what needs formal verification before procurement, authority submission, or construction.