Pipe Friction Loss Calculator

Calculate pressure drop and head loss in pipes using the Hazen-Williams equation. Includes equivalent length method for fittings and valves.

Flow Rate (GPM)

Nominal Pipe Size (in)

Pipe Material

Pipe Length (ft)

90° Elbows

45° Elbows

Tees (branch)

Gate Valves

0.20

Total Head Loss (ft)

0.09

Pressure Drop (PSI)

9.56

Velocity (ft/s)

0.147

ft loss / 100 ft

Straight Pipe Loss

0.15 ft

Fitting Equivalent Length

39.3 ft

Fitting Head Loss

0.06 ft

Flow Regime

Turbulent

✅ Velocity within recommended range (2-10 ft/s)