Flow Rate Calculator
Calculate fluid flow rate from velocity and area, or determine velocity from flow rate. Calculate volumetric and mass flow rates.
Input Parameters
Results
Enter values and click Calculate
About Flow Rate Calculator
Flow rate (Q) is the volume of fluid passing through a cross-section per unit time: Q = v × A, where v is velocity and A is area. Mass flow rate is ṁ = Q × ρ, where ρ is density.