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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

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Fluid Mechanics

Pipe Sizing Calculator

Find the minimum required pipe diameter to keep fluid velocity within safe limits for a given flow rate. Use this when selecting pipe sizes for new installations or checking whether existing pipes can handle increased flow.

Flow Rate (L/min)

Maximum Velocity (m/s)

Safety Factor

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Key differences

	Pump Power Calculator	Pipe Sizing Calculator
Category	Fluid Mechanics	Fluid Mechanics
Inputs required	5	3
Result	Required Power (kW)	Minimum Pipe Diameter (mm)
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.	Find the minimum required pipe diameter to keep fluid velocity within safe limits for a given flow rate. Use this when selecting pipe sizes for new installations or checking whether existing pipes can handle increased flow.