Hydraulics Calculators
Calculate pipe flow, analyze open channels, and design drainage conveyance systems using Manning's equation and hydraulic principles.
Pipe Flow
Calculate flow capacity and velocity in closed conduits
Open Channel Flow
Analyze flow in natural and constructed channels
Manning's Channel Flow
Calculate open channel flow capacity for trapezoidal, rectangular, and triangular sections
Critical Depth
Calculate critical depth for rectangular, trapezoidal, and circular channels
Normal Depth
Calculate normal depth for uniform flow using Manning's equation
Froude Number
Classify flow regime as subcritical, critical, or supercritical
Gradually Varied Flow
Calculate water surface profiles using Standard Step Method
Channel Design
Design and optimize channel cross-sections
Best Hydraulic Section
Optimize channel dimensions for maximum hydraulic efficiency
Compound Channel
Analyze channels with overbank flow and floodplains
Channel Transitions
Calculate head losses and water surface changes at transitions
Channel Protection
Design erosion protection and channel linings
Roadway Drainage
Calculate gutter flow and roadway hydraulics
Learning Resources
Understand the theory behind the calculations
Understanding Manning's Equation
How to apply V = (1.49/n) R^(2/3) S^(1/2)
Learn more: Understanding Manning's EquationOpen Channel Flow Basics
Uniform flow, critical depth, and flow classification
Learn more: Open Channel Flow BasicsManning's n Values Reference
Comprehensive table of roughness coefficients
Learn more: Manning's n Values ReferenceLooking for a different type of calculator?
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