Pipe Velocity Calculator with Flow Data & Charts
Calculate fluid flow velocity in circular pipes using Imperial and SI units. Supports calculations with volume flow rates and pipe inside diameters.
Pipe Velocity Calculator with Flow Data & Charts
Imperial Units
Fluid flow velocity in a circular pipe can be calculated as:
v = 0.4084 × q_gpm / d_in²
Where:
- v = velocity (ft/s)
- q_gpm = volume flow (US gal/min)
- d_in = pipe inside diameter (inches)
SI Units
v = 1.273 × q / d²
Where:
- v = velocity (m/s)
- q = volume flow (m³/s)
- d = pipe inside diameter (m)