Head Loss Calculator

Calculate total head loss using Darcy-Weisbach equation

Pipe System Parameters

Flow Rate (GPM)

Pipe Inside Diameter (inches)

Pipe Length (ft)

Absolute Roughness (ft)

Elevation Change (ft) - positive = uphill

Inlet Pressure (psi)

Water Temperature (°F)

Total Head Loss

23.74 ft

10.28 psi

Friction Head:3.23 ftMinor Losses:0.51 ftStatic Head:20.00 ftVelocity Head:0.101 ft

Velocity:2.55 ft/sReynolds No.:69672Flow Regime:TurbulentFriction Factor:0.02127

Inlet Pressure:50 psiOutlet Pressure:39.72 psiHydraulic Gradient:0.6459%

Pump Head Required

23.74 ft

Darcy-Weisbach Equation:

hf = f × (L/D) × (V²/2g)

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MyCalcBuddy Editorial Team

This page is maintained as an educational calculator reference.

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Formula Source: Standard Mathematical References

by Various

ðŸ”„Last reviewed: May 2026

âœ“Formula checks are based on standard references and internal QA review.