Compare calculators

Both calculators run independently — change the inputs on either side to compare results.

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.

Fluid Mechanics

Pipe Flow Velocity Calculator

Find the average velocity of fluid flowing inside a circular pipe from the volumetric flow rate and pipe diameter. Essential for checking whether flow falls within recommended velocity limits to avoid erosion or excessive head loss.

Flow Rate (m³/s)

Pipe Diameter (m)

Fill in the required fields to see your result.

Key differences

	Pipe Friction Loss Calculator	Pipe Flow Velocity Calculator
Category	Fluid Mechanics	Fluid Mechanics
Inputs required	4	2
Result	Pressure Loss (Pa)	Flow Velocity (m/s)
What it does	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.	Find the average velocity of fluid flowing inside a circular pipe from the volumetric flow rate and pipe diameter. Essential for checking whether flow falls within recommended velocity limits to avoid erosion or excessive head loss.