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PUMP ENGINEERING TOOLS

Pump Calculators for
Centrifugal & Process Pump Systems

Calculate total dynamic head (TDH), net positive suction head available (NPSHa), pipe friction and pump shaft power for centrifugal and chemical process-pump duties. Use the results to prepare a duty point for engineering review.

Each calculator shows its inputs and calculation basis. Unit options vary by tool. The results do not select a pump model; confirm the duty against candidate pump curves, fluid properties and project requirements.

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ENGINEERING TOOLS READY
8source-validated calculators
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Total Dynamic Head

Map static elevation, pressure and line losses into a traceable pump head requirement.

OUTPUTSTDH · pressure head · loss breakdown
Review calculator
DUTY POWEROPEN

Pump Power & Motor Sizing

Calculate hydraulic and shaft power from flow, TDH, density and pump efficiency.

OUTPUTShydraulic · shaft · supported motor range
Review calculator
PIPE LOSSOPEN

Pipe Friction & Minor Loss

Calculate velocity, Reynolds number, friction factor, straight-pipe and fitting losses.

OUTPUTSvelocity · Re · friction · total loss
Review calculator
CAVITATION CHECKOPEN

NPSH Available (NPSHa) Calculator

Estimate suction head from pressure, elevation, vapor pressure and line losses.

OUTPUTSNPSHa · pressure terms · NPSHr comparison
Review calculator
ADVANCED SYSTEMOPEN

Pump System Hydraulic

Evaluate split discharge paths, Darcy friction and minor losses for a real system.

OUTPUTSsystem head · flow split · friction factor
Review calculator
SPEED CHANGEOPEN

Affinity Laws / VFD

Compare flow, head and power as pump speed changes under the documented affinity laws.

OUTPUTSspeed ratio · Q · H · power
Review calculator
DUTY INTAKEOPEN

Centrifugal / Chemical Pump Sizing

Prepare a duty package for engineering review without claiming an automatic pump model.

OUTPUTSduty summary · missing data · RFQ
Review calculator
CONDITIONAL TOOLOPEN

Liquid Ring Vacuum Pump Sizing

Calculate leakage, continuous exhaust and intermittent evacuation capacity from the source sheet.

OUTPUTSleakage · corrected Se · intermittent S
Review calculator

Prefer a spreadsheet?

Browse pump calculation workbooks

Preview free Excel tools for pump head, NPSH, hydraulic systems, vacuum pumps and related engineering calculations.

View Excel workbooks

Before you calculate

Prepare the data behind your pump duty

A useful pump calculation starts with a defined system boundary and operating condition. Gather the process and piping data first, then use the matching tool below.

Inputs to gather

  • Required flow: the design flow and any normal or maximum operating cases.
  • Liquid properties: density, viscosity, temperature and vapor pressure when the tool requests them.
  • Suction and discharge conditions: liquid levels and vessel pressures, using the pressure basis shown by the calculator.
  • Piping details: inside diameter, length, material or roughness, and the fittings included in each line.
  • Pump data: use efficiency and NPSHr only when available from the candidate pump curve or manufacturer data.

Engineering workflow

Carry the duty into pump-curve review

Flow and total dynamic head define the hydraulic duty to review. Check that point against the candidate pump curve, then confirm operating range, absorbed power, NPSHr, materials and service conditions.

Pipe FrictionTDHNPSHPump PowerPump Performance CurvesANSI Pump Selection

Source-validation method

Accuracy before selection.

Source files were audited locally, legacy workbooks were converted on copies, and every online result was checked against mapped regression values before release.

SI canonical core T1–T6 regression path Desktop · tablet · mobile QA RFQ prefill ready

Calculator questions

Pump calculator FAQs

Do these calculators select a pump model?

No. They calculate or organize duty information for engineering review. Final selection requires a candidate pump curve and checks for operating range, power, NPSH, materials and service conditions.

Which units should I enter?

Follow the units displayed by the individual calculator. Some tools offer unit choices; others use a defined input system. Keep pressure values on the stated absolute or gauge basis and do not mix units within one calculation.

Can I use these tools for chemical process pumps?

Several calculators accept fluid properties used in process-pump duty preparation. Check each tool’s calculation scope and source assumptions, especially for viscosity, vapor pressure and suction conditions.

Next step

Need an engineering review of your duty?

Bring your calculated flow, head and process conditions to the pump duty review form.

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