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Both calculators run independently — change the inputs on either side to compare results.

Centrifugal Pump Sizing Calculator

Calculate the shaft power required to drive a centrifugal pump given flow rate, total head, and combined pump and motor efficiency. Used when selecting a pump-motor set for fluid transfer systems.

Flow Rate (m³/h)

Static Head (m)

Friction Losses (m)

Fluid Density (kg/m³)

Pump Efficiency (%)

Motor Efficiency (%)

Fill in the required fields to see your result.

Chemical Engineering

Pipe Flow Pressure Drop Calculator

Compute pressure drop along a straight pipe section using the Darcy-Weisbach equation, with automatic friction factor selection for laminar or turbulent flow. Essential for sizing pipes and checking pump requirements.

Volumetric Flow Rate (m³/h)

Pipe Inner Diameter (mm)

Pipe Length (m)

Fluid Density (kg/m³)

Dynamic Viscosity (Pa·s)

Pipe Roughness

Fill in the required fields to see your result.

Key differences

	Centrifugal Pump Sizing Calculator	Pipe Flow Pressure Drop Calculator
Category	Chemical Engineering	Chemical Engineering
Inputs required	6	6
Result	Required Motor Power (kW)	Pressure Drop (kPa)
What it does	Calculate the shaft power required to drive a centrifugal pump given flow rate, total head, and combined pump and motor efficiency. Used when selecting a pump-motor set for fluid transfer systems.	Compute pressure drop along a straight pipe section using the Darcy-Weisbach equation, with automatic friction factor selection for laminar or turbulent flow. Essential for sizing pipes and checking pump requirements.