Calculators Pipe Velocity Calculator Pipe Velocity Calculator Calculate fluid velocity through a pipe based on internal diameter and flowrate. Volumetric Flow Mass Flow 1. Pipe Specifications Internal Pipe Diameter (D) in mm cm m Target Velocity Unit ft/s (Feet per second) ft/min (Feet per minute) m/s (Meters per second) 2. Process Conditions Flow Rate Standard Flow selected. Please provide operating conditions to convert to Actual Flow. Operating Pressure psig psia bar(g) bar(a) Operating Temperature °F °C Fluid Density (ρ) lb/ft³ kg/m³ g/cm³ (kg/L) Required to convert mass flow to volume. Calculate Velocity Flow Results 0.00 ft/s Cross-Sectional Area 0.0 in²