Water Demand Calculator
Estimate daily demand, peak demand, diversity effect, and storage requirement.
Open ToolWater Pump NPSH Calculator
A pump suction planning calculator that estimates available NPSH from atmospheric pressure, suction head, vapor pressure, suction loss, and pump NPSHr.
Inputs
Forms are empty on load. Use sample data to preview the workflow or enter your own project values.
Learn more
Formula logic, assumptions, limits, and worked-use guidance for this calculator.
How this tool helps
Use this before pump selection to catch suction-side cavitation risk. Final NPSH checks must use actual site elevation, liquid temperature, suction fittings, and manufacturer pump curves.
Calculation methodology
NPSHa = atmospheric head + suction static head - vapor pressure head - suction pipe loss. Margin = NPSHa - NPSHr.
Assumptions and limits
This is a planning-level calculator. Final decisions should be checked against approved project standards, local authority requirements, manufacturer data, and qualified engineering review.
Version history
- v1.3.7-prelaunch: Added for pump NPSH, suction head, and cavitation check search demand.
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