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

Pump Power Calculator

Calculate the shaft power and motor input power needed to pump a fluid against a given head. Use this for selecting pump and motor sizes in water supply, irrigation, and industrial systems.

Flow Rate (m³/s)

Total Dynamic Head (m)

Fluid Density (kg/m³)

Pump Efficiency

Motor Efficiency

Fill in the required fields to see your result.

Fluid Mechanics

Pipe Flow Calculator

Determine pressure drop in circular pipes using the Darcy-Weisbach equation. Use this when designing water supply lines, HVAC ducts, or industrial piping systems to ensure adequate flow.

Pipe Diameter (m)

Pipe Length (m)

Pipe Material

Flow Velocity (m/s)

Kinematic Viscosity (m²/s)

Fill in the required fields to see your result.

Key differences

	Pump Power Calculator	Pipe Flow Calculator
Category	Fluid Mechanics	Fluid Mechanics
Inputs required	5	5
Result	Required Power (kW)	Pressure Drop (Pa)
What it does	Calculate the shaft power and motor input power needed to pump a fluid against a given head. Use this for selecting pump and motor sizes in water supply, irrigation, and industrial systems.	Determine pressure drop in circular pipes using the Darcy-Weisbach equation. Use this when designing water supply lines, HVAC ducts, or industrial piping systems to ensure adequate flow.