Hazen-Williams Pipe Flow Calculator

About the Hazen-Williams Pipe Flow Calculator

The Hazen-Williams Pipe Flow Calculator allows you to easily determine head loss, pressure drop, or flow rate in pressurized pipes using the Hazen-Williams equation. By entering the pipe diameter, pipe length, flow rate, and Hazen-Williams C factor, this tool provides accurate hydraulic calculations for water and other fluids. It is ideal for engineers, students, and hydraulic professionals.

What You Can Calculate

• Head Loss (h_f): The energy loss due to friction in a pipe, measured in meters (m).
• Pressure Drop (ΔP): The reduction in pressure along a pipe due to flow resistance, calculated from head loss.
• Flow Rate (Q): Determine flow velocity or volumetric flow in the pipe when other parameters are known.
• Hydraulic Design Optimization: Evaluate the effect of pipe diameter, length, and roughness on system performance.

Formulas Used in the Calculator

The calculator uses the standard Hazen-Williams equation for pressurized pipe flow:

• Head Loss: h_f = 10.67 × L × Q^1.852 / (C^1.852 × D^4.87)
• where:
• L = pipe length (m)
• D = pipe diameter (m)
• Q = flow rate (m³/s)
• C = Hazen-Williams roughness factor (dimensionless)

How to Use the Calculator

1. Enter the pipe diameter and select the appropriate unit (m, cm, mm, in).
2. Provide the pipe length and unit (m, cm, mm, ft).
3. Input the flow rate and choose the corresponding unit (m³/s, L/s, ft³/s, GPM).
4. Enter the Hazen-Williams C factor based on pipe material and condition.
5. The calculator instantly displays the head loss and, if needed, pressure drop or flow rate.

Applications of Hazen-Williams Calculation

Understanding pipe flow and head loss is critical for hydraulic system design, water supply networks, and industrial piping. Engineers use these calculations to size pipes, select pumps, optimize fluid distribution, and reduce energy losses in pressurized systems.