Pipe Pressure Calculator — Calculate Fluid Pressure in Pipes

Pipe Pressure Calculator

Calculate fluid pressure, pressure drop, and flow characteristics in pipes for optimal system design. Determine pressure loss based on pipe dimensions, fluid properties, and flow conditions.

Step 1: Pipe Specifications

Understanding Pipe Pressure

Pressure drop in pipes depends on diameter, length, fluid velocity, and pipe roughness. Larger diameters reduce pressure loss, while longer pipes and higher velocities increase it.

Step 2: Fluid & Flow Conditions

20 GPM
68°F

About Pressure Drop

Pressure drop increases with flow rate, pipe length, and fluid viscosity. Smooth pipes like PVC have lower friction loss than rough pipes like concrete. Higher temperatures reduce fluid viscosity, affecting pressure drop.

Pipe Pressure Results

Summary
Material Comparison
Breakdown

Total Pressure Drop

4.2 psi
For 100 ft of 1″ copper pipe with water at 20 GPM
Flow Velocity
5.1 ft/s
Reynolds Number
42,500
Pipe Diameter
1″
Fluid Type
Water

Pipe Material Friction Comparison

Pipe Material Roughness (mm) Friction Factor Pressure Loss

Pressure Drop Breakdown

Pressure Drop Calculation Formula

Darcy-Weisbach Equation: ΔP = f × (L/D) × (ρ × V² / 2)

Where: f = friction factor, L = pipe length, D = pipe diameter, ρ = fluid density, V = fluid velocity. The friction factor depends on pipe roughness and Reynolds number.

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