Friction Loss and Reynolds Number

These tools estimate losses in a pipe. Get pressure drop and head loss, apply Hazen Williams for water, find the Reynolds number and whether flow is laminar or turbulent, and read the friction factor from a Moody chart.

Tools in this group

• Hazen Williams Formula Calculator — Apply the Hazen Williams equation to water pipes: solve for head loss, flow, pipe diameter or the C factor, in US or SI units.
• Moody Chart and Friction Factor Calculator — Enter the Reynolds number and pipe roughness to get the Darcy friction factor and see your point on an interactive Moody chart.
• Pressure Drop Calculator (Pipe Friction Loss) — Enter the flow, the pipe and its length to get the pressure drop and head loss, with the Darcy friction factor, Reynolds number and a friction loss table.
• Reynolds Number Calculator — Find the Reynolds number of a pipe flow from velocity or flow rate, pipe size and fluid, and see whether it is laminar or turbulent.