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Fluid Velocity Calculator

Calculate flow velocity, Reynolds number and pressure drop

Piping system type
m/s
Pa/m
m/s
Volume Flow
Fluid volume flow
Fluid
Fluid type
Pipe
Pipe material
Instructions
Enter fluid volume flow, select fluid type and pipe size. The calculator computes flow velocity, Reynolds number and pressure drop.
Calculation formulas
  • Cross-sectional area: A = πD²/4
  • Flow velocity: v = Q/A
  • Reynolds number: Re = ρvD/μ
  • Pressure drop: Δp/L = λ·ρv²/(2D)
Recommendations
  • Heating piping: 0.5–1.5 m/s
  • Domestic water piping: 1.0–2.0 m/s