EVERYDAY
Pipe Flow Velocity Calculator
Convert volumetric flow into average velocity inside a circular pipe.
Your result
EVERYDAYEnter your values and select calculate.
On this page How it works & practical examples
How to use the Pipe Flow Velocity Calculator
Use internal diameter and actual volume flow for the operating condition. This is cross-sectional average velocity, not a detailed velocity profile.
The calculation
Velocity_m/s = (L/min ÷ 60,000) / [π(diameter_mm/1000)²/4]
Worked example
60 L/min through a 25 mm internal diameter pipe gives average velocity about 2.0372 m/s.
Assumptions and limits
Assumes a full circular pipe. Pressure drop, pump suitability, viscosity, compressibility and flow-regime checks are excluded.
Common questions
Which inputs should I use?
Use internal diameter and actual volume flow for the operating condition. This is cross-sectional average velocity, not a detailed velocity profile.
What does the result exclude?
Assumes a full circular pipe. Pressure drop, pump suitability, viscosity, compressibility and flow-regime checks are excluded.