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

Pipe Flow Reynolds Number Calculator

Computes the Reynolds number for flow inside a pipe to classify the flow as laminar, transitional, or turbulent. Essential for friction factor selection, heat transfer design, and mixing analysis.

Fluid Velocity (m/s)

Pipe Diameter (m)

Fluid Density (kg/m³)

Dynamic Viscosity (Pa·s)

Fill in the required fields to see your result.

Fluid Mechanics

Pump Power and Efficiency Calculator

Calculates the shaft power a pump must deliver to move fluid against a given head, accounting for pump efficiency. Used when selecting pumps for water supply, irrigation, HVAC, and industrial process systems.

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 Flow Reynolds Number Calculator	Pump Power and Efficiency Calculator
Category	Fluid Mechanics	Fluid Mechanics
Inputs required	4	4
Result	Reynolds Number	Required Power (kW)
What it does	Computes the Reynolds number for flow inside a pipe to classify the flow as laminar, transitional, or turbulent. Essential for friction factor selection, heat transfer design, and mixing analysis.	Calculates the shaft power a pump must deliver to move fluid against a given head, accounting for pump efficiency. Used when selecting pumps for water supply, irrigation, HVAC, and industrial process systems.