Head Loss Calculator — Darcy-Weisbach Friction Loss

Compute friction head loss in pipes using the Darcy-Weisbach equation. Account for pipe length, diameter, flow, and roughness.

Fluid Velocity (m/s)
Pipe Diameter (m)
Kinematic Viscosity ν (m²/s)
Common ν: Water 20°C = 1.004×10⁻⁶ · Air 20°C = 1.516×10⁻⁵ m²/s
⟨∿⟩ Fluids Reference: All calculations use SI units (Pa, m³/s, W, K). Moody friction factor uses Blasius smooth-pipe approximation. Bernoulli assumes ideal, incompressible, steady flow along a streamline.
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How It Works

Compute friction head loss in pipes using the Darcy-Weisbach equation. Account for pipe length, diameter, flow, and roughness

Each component has a specific meaning:

  • Darcy-Weisbach equation — The darcy-weisbach equation recorded for the patient or scenario being assessed.

Note: Interpret the head loss (darcy-weisbach) result against the clinical thresholds and context described above.

How to Use

Enter the Darcy-Weisbach equation for the patient or scenario you are assessing. Compute friction head loss in pipes using the Darcy-Weisbach equation. Account for pipe length, diameter, flow, and roughness. Use the head loss (darcy-weisbach) result to inform your clinical assessment.

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Frequently Asked Questions