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Pipe Flow Rate Calculator

Determine volumetric flow rate through a pipe using the Hazen-Williams equation for water distribution systems. Used by civil and mechanical engineers to size pipes and diagnose pressure loss.

Pipe Diameter (m)

Pipe Length (m)

Head Loss (m)

Hazen-Williams C Factor

Result Units

Fill in the required fields to see your result.

Engineering

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)

Fluid Density (kg/m³)

Fill in the required fields to see your result.

Key differences

	Pipe Flow Rate Calculator	Pipe Pressure Drop Calculator
Category	Engineering	Engineering
Inputs required	5	5
Result	Flow Rate (L/s)	Pressure Drop (Pa)
What it does	Determine volumetric flow rate through a pipe using the Hazen-Williams equation for water distribution systems. Used by civil and mechanical engineers to size pipes and diagnose pressure loss.	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.