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Fitting Pressure
Drop
Calculator
Calculate pressure drop through pipe fittings using the equivalent length method
Input Parameters
Flow Rate (GPM)
Pipe Inner Diameter (in)
Fitting Type
90° Elbow
45° Elbow
Tee (through)
Tee (branch)
Gate Valve (full open)
Globe Valve
Number of Fittings
Fluid Specific Gravity
Calculate
Results
--
Equivalent Length
ft
--
Fluid Velocity
ft/s
--
Pressure Drop
psi
--
Total ΔP (all fittings)
psi
Note:
L/D values per Crane TP-410. Friction factor assumes turbulent flow (f≈0.02).
Reference
Equivalent Length = (L/D ratio) × d | ΔP = 0.000216 × f × (L/D) × SG × Q² / d⁴