Use this engineering calculation for a transparent preliminary estimate or independent arithmetic check when geometry, materials, loads, operating conditions, and units are defined consistently.

Elevation Meters (m)

Required number input.

Pressure Pascals (Pa)

Required number input.

Density Kg Per M3 (kg/m³)

Required number input.

Speed Meters Per Second (m/s)

Required number input.

Gravity Meters Per Second Squared (m/s²)

Required number input.

Total ideal-flow head as elevation plus pressure head and velocity head; excludes friction and pump terms. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Total Head Meters (m)

The resulting total head meters returned as a number.

• Hydraulic equations require consistent datum, fluid properties, geometry, roughness, flow regime, and loss coefficients. Cavitation, air entrainment, unsteady flow, fittings, sediment, free-surface effects, and pump behavior may require a network or numerical model.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check assumptions against drawings, measurements, current material data, and the applicable design code. Apply required load combinations and safety factors, then obtain qualified review and testing for consequential designs.

• Pump Head Total Dynamic

  Total dynamic pump head from signed static lift plus positive friction, discharge-pressure and velocity heads.

• Pump NPSH Available

  Available pump NPSH from absolute suction pressure head plus velocity head minus vapor pressure head; supply losses are already reflected in suction pressure.

• Brake Torque Drum

  Ideal drum braking torque from total tangential friction force at the effective friction radius.