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Pipe Pressure Drop Calculator

Calculate frictional pressure drop in a pipe using the Darcy-Weisbach equation, given friction factor, length, diameter, and fluid velocity. Use it for pump sizing, HVAC duct design, and fluid distribution system layout.

Friction Factor

Pipe Length (m)

Pipe Diameter (m)

Flow Velocity (m/s)

Engineering

Pipe Flow Friction Loss Calculator

Calculates pressure drop due to friction in straight pipe runs using the Darcy-Weisbach equation. Use it when sizing pumps, designing piping systems, or troubleshooting flow resistance in water, oil, or gas networks.

Flow Rate (m³/s)

Pipe Internal Diameter (mm)

Pipe Length (m)

Pipe Roughness

Fluid Density (kg/m³)

Key differences

	Pipe Pressure Drop Calculator	Pipe Flow Friction Loss Calculator
Category	Engineering	Engineering
Inputs required	4	5
Result	Pressure Drop (Pa)	Pressure Drop (Pa)
What it does	Calculate frictional pressure drop in a pipe using the Darcy-Weisbach equation, given friction factor, length, diameter, and fluid velocity. Use it for pump sizing, HVAC duct design, and fluid distribution system layout.	Calculates pressure drop due to friction in straight pipe runs using the Darcy-Weisbach equation. Use it when sizing pumps, designing piping systems, or troubleshooting flow resistance in water, oil, or gas networks.