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

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

Fill in the required fields to see your result.

Fluid Mechanics

Pump Power Calculator

Calculate the shaft power a pump must deliver to move fluid through a system against a given total head. Use this to size pump motors or estimate energy consumption in HVAC, water supply, and process engineering.

Flow Rate (m³/s)

Total Head (m)

Fluid Density (kg/m³)

Pump Efficiency

Fill in the required fields to see your result.

Key differences

	Pipe Sizing Calculator	Pump Power Calculator
Category	Fluid Mechanics	Fluid Mechanics
Inputs required	3	4
Result	Minimum Pipe Diameter (mm)	Required Power (kW)
What it does	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.	Calculate the shaft power a pump must deliver to move fluid through a system against a given total head. Use this to size pump motors or estimate energy consumption in HVAC, water supply, and process engineering.