Flow Rate Calculator
Calculate fluid flow rate through pipes with our comprehensive calculator. Determine flow rate, velocity, and pressure drop based on pipe dimensions, fluid properties, and flow conditions.
Step 1: Pipe Specifications
Understanding Pipe Roughness
The Hazen-Williams C coefficient represents the smoothness of the pipe interior. Higher values mean smoother pipes with less friction loss. PVC and copper pipes typically have C values of 140-150.
Step 2: Flow Parameters
Optimal Flow Velocity
For water systems, typical velocities are 1-2 m/s for residential applications and 2-3 m/s for industrial systems. Higher velocities increase pressure drop and energy consumption.
Flow Rate Results
Calculated Flow Rate
Pipe Size Flow Comparison
| Pipe Size | Diameter (mm) | Flow Rate (L/s) | Velocity (m/s) |
|---|
Flow Rate Breakdown
Flow Rate Formula
Q = A × v = π × (D/2)² × v
To calculate flow rate (Q): Multiply the cross-sectional area (A) of the pipe by the flow velocity (v). Area is calculated as π times radius squared. For metric: Q(L/s) = A(m²) × v(m/s) × 1000.
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