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Friction Factor Calculator

Find the Darcy-Weisbach friction factor for laminar or turbulent pipe flow from the Reynolds number and pipe roughness. Essential for calculating head loss in piping system designs.

Reynolds Number

Relative Roughness

Pipe Condition

Temperature Factor

Flow Regime

Fill in the required fields to see your result.

Fluid Mechanics

Pipe Friction Loss Calculator

Estimate the pressure head lost to friction in any pipe system using the Darcy-Weisbach equation. Use it when designing water supply lines, irrigation networks, or HVAC piping to ensure adequate flow pressure.

Flow Rate (L/min)

Pipe Diameter (mm)

Pipe Length (m)

Fluid Density (kg/m³)

Fill in the required fields to see your result.

Key differences

	Friction Factor Calculator	Pipe Friction Loss Calculator
Category	Fluid Mechanics	Fluid Mechanics
Inputs required	5	4
Result	Friction Factor	Pressure Loss (Pa)
What it does	Find the Darcy-Weisbach friction factor for laminar or turbulent pipe flow from the Reynolds number and pipe roughness. Essential for calculating head loss in piping system designs.	Estimate the pressure head lost to friction in any pipe system using the Darcy-Weisbach equation. Use it when designing water supply lines, irrigation networks, or HVAC piping to ensure adequate flow pressure.