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Pipe Flow & Pressure Drop Calculator

Calculate flow velocity, Reynolds number, friction factor, head loss and pressure drop along a pipe run.

Works in BrowserInstant
mm
m
L/s
ΣK
Pressure Drop

💡 Uses Darcy-Weisbach with the Swamee-Jain friction factor for turbulent flow and f = 64/Re for laminar. Results assume steady, full-bore, single-phase flow in a straight horizontal pipe. Add elevation change separately.