Total Piping Pressure Drop Calculator

Inputs

Pipe material ε

Fluid

Nominal pipe size NPS

Pipe schedule / SDR

Custom inside diameter

Absolute roughness

Custom fluid properties

Flow rate Q

Pipe length L

Fittings and valves ΣK

Select up to 10 types and enter quantities.

Fitting type

Quantity

K subtotal

Combined fittings coefficient ΣK = 0

Elevation change Δz

Include static head in total required pressure

Primary result unit

Positive elevation means the outlet is above the inlet. Fitting K values are representative engineering estimates and should be replaced with manufacturer data for final design.

Result

— psipipe + fittings

Ready.

Velocity—

Reynolds number—

Darcy friction factor—

Flow regime—

Straight-pipe loss—

Fittings loss—

Loss per 100 ft—

Hydraulic power—

Method


          v = Q/A

          Re = ρvD/μ

          h_f = f(L/D)(v²/2g)

          h_m = ΣK(v²/2g)

          ΔP = ρg(h_f + h_m [+ Δz])

          f = 64/Re (laminar); Swamee–Jain (turbulent)