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