Darcy–Weisbach head loss

Darcy–Weisbach head loss with explicit inputs, units and reproducible calculations.

Inputs

• Darcy friction factor (ratio)
• Pipe length (m)
• Internal diameter (mm)
• Mean velocity (m/s)
• Gravity (m/s²)

Assumptions and limitations

Steady full-pipe major loss with supplied Darcy factor. Excludes minor losses, pumps and roughness/friction-factor estimation.

Source

Calculation source

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