🚰 Flow Rate Calculator
Calculate the volumetric flow rate of a fluid moving through a pipe or channel from its velocity and cross-sectional area.
m/s
cm
What This Calculates
Volumetric flow rate describes how much fluid volume passes a point per unit time — a key value in plumbing, irrigation, and industrial piping design.
The Formula
Q = v × A, where v is the average fluid velocity and A = π(d/2)² is the pipe’s circular cross-sectional area (this is the continuity equation for incompressible flow).
For general educational and planning purposes.
Last reviewed August 2026