Water Flow Calculator — Calculate Water Flow Rate & Pressure

Water Flow Calculator

Calculate water flow rate, velocity, and pressure drop in pipes. Perfect for plumbing, irrigation, and hydraulic system design.

Step 1: Pipe Details

Understanding Flow Rate

Flow rate depends on pipe diameter, length, material roughness, and pressure. Larger diameters and smoother materials allow higher flow rates with less pressure drop.

Step 2: Flow Conditions

About Hazen-Williams Equation

The Hazen-Williams equation is commonly used for calculating water flow in pressurized pipes. It considers pipe material (C factor), diameter, length, and pressure drop.

Water Flow Calculation Results

Summary
Pipe Comparison
Flow Analysis

Calculated Water Flow Rate

45.2 GPM
Velocity: 4.3 ft/s
Flow Velocity
4.3 ft/s
Pressure Drop
8.2 PSI
Reynolds Number
85,200
Flow Type
Turbulent

Pipe Material Flow Comparison

Pipe Material C Factor Flow Rate Velocity Pressure Drop

Flow Rate Analysis

Hazen-Williams Formula

Q = k × C × d2.63 × (ΔP/L)0.54

Where Q = flow rate, C = Hazen-Williams coefficient, d = diameter, ΔP = pressure drop, L = length, and k = unit conversion constant. This formula is widely used for water flow calculations in pressurized pipes.

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