Pump System Hydraulic Calculator
Calculate pipe losses, pump head, shaft power and NPSH from a continuous vessel-to-vessel balance.
- Use for
- Newtonian-liquid systems with one suction leg and up to three discharge legs
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Free Pump Engineering Calculation Spreadsheets
Choose an Excel workbook for pump head, NPSH, vacuum sizing or a defined slurry example. Preview the inputs, method and limits before downloading.
Start with the engineering task
Three common workflows, with the calculation boundary stated in each preview.
Lift Station Pump Head Calculator
Review water-based lift-station head examples with live spare segments and traceable fitting velocities.
- Use for
- Wastewater lift stations and transfer systems
Centrifugal Pump NPSH Calculator
Recalculate suction losses and available NPSH, with clear failure and missing-margin states.
- Use for
- Newtonian-liquid suction-system screening
Find a pump engineering workbook
Calculators, worked examples and reference material are labelled separately.
Pump System Hydraulic Calculator
Calculate pipe losses, pump head, shaft power and NPSH from a continuous vessel-to-vessel balance.
- Use for
- Newtonian-liquid systems with one suction leg and up to three discharge legs
Lift Station Pump Head Calculator
Review water-based lift-station head examples with live spare segments and traceable fitting velocities.
- Use for
- Wastewater lift stations and transfer systems
Centrifugal Pump NPSH Calculator
Recalculate suction losses and available NPSH, with clear failure and missing-margin states.
- Use for
- Newtonian-liquid suction-system screening
Pump Engineering Calculation Formulas
Pump relations and worked examples, with corrected friction, power and unit conversions.
- Use for
- Pump engineering reference and basic calculations
Liquid Ring Vacuum Pump Sizing
Estimate gas duty, air leakage and evacuation capacity with corrected mixture molar mass.
- Use for
- Preliminary liquid-ring vacuum duty estimates
Pump Head Determination + Friction Reference
Calculate head using signed vessel levels, a general Darcy friction model and reference tables.
- Use for
- Preliminary pump head and pipe-loss calculations
Automatic Pump Head Calculator
Enter flow, fluid and system data to recalculate required head with explicit units and signed levels.
- Use for
- Fast pump head estimates
Pump System Sheet — Archived HG/T Example
Review a linked pressure-balance example following the legacy HG/T 20570.5-95 sheet structure.
- Use for
- Projects reviewing a legacy HG/T calculation format
Centrifugal Pump Calculation Workbook
Use one consistent pipe-loss and power balance, with required vessel data identified before duty output.
- Use for
- Pipe systems with many fittings and valves
Slurry Pump & VFD Worked Examples
Inspect defined slurry pipeline examples and VFD affinity estimates with a consistent actual-speed reference.
- Use for
- Reviewing salt-slurry examples and understanding VFD affinity estimates
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See the method and the limits.
Each preview identifies the calculation boundary, revision and checks performed. A worked example is a starting point for your inputs, not a certified pump selection.
Formula and unit checksDocumented equations, units and known example results
Inputs that recalculateParameter changes checked against dependent outputs
Explicit operating limitsPressure basis, method scope and missing data identified
Software compatibilityTested in Microsoft Excel 16; WPS / LibreOffice not tested.
Need a duty point checked?
Send your flow, fluid, temperature and system data for review against a manufacturer’s pump curve.