Water Flow Rate Calculator

Calculate flow rates in pipes, open channels, and pressure flow systems.
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Inputs

Flow Rate Formulas: Pipe Flow: Q = A × V = πD²/4 × √(2gΔh/L)
Open Channel: Q = (1/n) × A × R(2/3) × S(1/2)
Manning's Equation: V = (1/n) × R(2/3) × S(1/2)
Continuity: Q = A × V
Typical: 0.01-0.05 (smooth to rough pipes)
Affects viscosity and density

Results

Enter flow system parameters to calculate water flow rates and velocities.

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