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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.

Chemical Engineering

Pipe Pressure Drop Calculator

Compute the friction term f·(L/D)·(v²/2) from the Darcy-Weisbach equation — the specific energy loss per unit mass of fluid flowing through a straight pipe. Multiply by fluid density to get pressure drop in Pa, or divide by g for head loss in metres.

Friction Factor

Pipe Length (m)

Pipe Diameter (m)

Fluid Velocity (m/s)

Fill in the required fields to see your result.

Key differences

	Pipe Flow Pressure Drop Calculator	Pipe Pressure Drop Calculator
Category	Chemical Engineering	Chemical Engineering
Inputs required	6	4
Result	Pressure Drop (kPa)	Pressure Drop (m)
What it does	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.	Compute the friction term f·(L/D)·(v²/2) from the Darcy-Weisbach equation — the specific energy loss per unit mass of fluid flowing through a straight pipe. Multiply by fluid density to get pressure drop in Pa, or divide by g for head loss in metres.