# Volumetric flow rate

## Description

The volumetric flow rate is the volume of fluid which passes through a given surface per unit time. Fow velocity in fluid dynamics or drift velocity in electromagnetism, of a fluid is a vector field which is used to mathematically describe the motion of a fluid. The length of the flow velocity vector is the flow speed.

Related formulas## Variables

Q | Volumetric flow rate (m^{3}/s) |

A | Surface ( cross-sectional area) (m^{2}) |

v | Flow speed (m/s) |