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Pipe Flow Velocity Calculator

Calculates the average flow velocity of fluid in a circular pipe given a volumetric flow rate and pipe diameter. Use it when sizing pumps, checking design velocities, or troubleshooting pipe systems.

Flow Rate (m³/s)

Pipe Diameter (mm)

Fill in the required fields to see your result.

Civil

Water Pipe Flow Calculator

Calculate flow rate in a pressurized water pipe using the Hazen-Williams equation. Used by plumbing and civil engineers to size distribution mains, evaluate pump systems, and check hydraulic capacity.

Pipe Diameter (inches)

Pipe Length (ft)

Head Loss (ft)

Hazen-Williams C Value

Fill in the required fields to see your result.

Key differences

	Pipe Flow Velocity Calculator	Water Pipe Flow Calculator
Category	Civil	Civil
Inputs required	2	4
Result	Flow Velocity (m/s)	Flow Rate (gpm)
What it does	Calculates the average flow velocity of fluid in a circular pipe given a volumetric flow rate and pipe diameter. Use it when sizing pumps, checking design velocities, or troubleshooting pipe systems.	Calculate flow rate in a pressurized water pipe using the Hazen-Williams equation. Used by plumbing and civil engineers to size distribution mains, evaluate pump systems, and check hydraulic capacity.