Hazen Williams Equations Calculator

Hydraulics and Fluid Mechanics Formulas

Solving for pipe diameter
Note: Valid only for ambient temperatures and turbulent flow

Inputs:

 flow rate or discharge (Q) meter^3/secondcc/hourcentimeter^3/secondcentimeter^3/hourdeciliter/minutefoot^3/minutefoot^3/secondgallon/minuteliter/dayliter/minuteliter/secondmeter^3/daymeter^3/minutemilliliter/hourmilliliter/minute
 Hazen Williams friction coefficient(C)
 hydraulic grade line slope (s)

Conversions:

 flow rate or discharge (Q)= 0 = 0gallon/minute
 Hazen Williams friction coefficient(C)= 0 = 0
 hydraulic grade line slope (s)= 0 = 0

Solution:

 pipe diameter (D)= NOT CALCULATED

Other Units:

Change Equation
Select to solve for a different unknown
Mean Fluid Velocity
 mean flow velocity friction coefficient hydraulic radius hydraulic grade line slope
Fluid Flow Rate
 discharge or flow rate friction coefficient pipe diameter hydraulic grade line slope
Where
 v = mean flow velocity C = Hazen Williams friction coefficient r = hydraulic radius s = hydraulic grade line slope Q = flow rate or discharge D = pipe diameter

Reference - Books:
1) P. Aarne Vesilind, J. Jeffrey Peirce and Ruth F. Weiner. 1994. Environmental Engineering. Butterworth Heinemann. 3rd ed.

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