Manning's Equation Calculators
Enter value, select unit and click on calculate. Result will be displayed.

Calculate Manning's Roughness Coefficient
Calculate Flow Velocity
Calculate Hydraulic Radius
Calculate Line Slope

 

Calculate Manning Roughness Coefficient

n = Manning's Roughness Coefficient
R = Hydraulic Radius
S = Line Slope
V = Flow Velocity

Enter your values:
Hydraulic Radius:
Line Slope:
Flow Velocity :
Result:
Manning's Roughness Coefficient:

Calculate Flow Velocity

V = Flow Velocity
R = Hydraulic Radius
S = Line Slope
n = Manning's Roughness Coefficient

Enter your values:
Hydraulic Radius:
Line Slope:
Manning's Roughness Coefficient:
Result:
Flow Velocity: Foot/Second

Calculate Hydraulic Radius

R = Hydraulic Radius
V = Flow Velocity
n = Manning's Roughness Coefficient
S = Line Slope

Enter your values:
Flow Velocity :
Manning's Roughness Coefficient:
Line Slope:
Result:
Hydraulic Radius: Foot

Calculate Line Slope

V = Flow Velocity
n = Manning's Roughness Coefficient
R = Hydraulic Radius
S = Line Slope

Enter your values:
Flow Velocity :
Manning's Roughness Coefficient:
Hydraulic Radius:
Result:
Line Slope:

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