Pipe Flow Calculator
How to calculate pipe flow and pressure drop
- Enter the flow rate, inside diameter and length of the pipe, and choose the pipe material.
- Keep water at 20 °C or enter another fluid's density and viscosity.
- See the velocity, Reynolds number, friction factor, pressure drop and head loss.
Frequently asked questions
Which method is used?
Darcy-Weisbach, with the Swamee-Jain approximation of the Colebrook equation for turbulent flow and 64 / Re for laminar flow.
Does it include fittings?
No. Add the equivalent length of bends, valves and fittings to the pipe length.
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