# Hazen Williams Equations Calculator

## Hydraulics and Fluid Mechanics Formulas

Solving for flow mean velocity Note: Valid only for ambient temperatures and turbulent flow

#### Inputs:

Hazen Williams friction coefficient (C)
unitless
hydraulic grade line slope (s)
unitless

#### Conversions:

Hazen Williams friction coefficient (C)
= 0
= 0
= 0
= 0
foot
hydraulic grade line slope (s)
= 0
= 0

#### Solution:

flow mean velocity (v)
= NOT CALCULATED

#### Other Units:

Change Equation
Select to solve for a different unknown
Mean Fluid Velocity
Fluid Flow Rate
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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