Definition: Flow rate designates the physical quantity that indicates which volume of a medium is transported within a certain time period through a defined cross section. The flow rate is also referred to as volume flow rate or volumetric flow rate. The most common unit for flow rate is cubic meter per second (m³/s). For certain magnitudes or applications, other units are also customary, such as milliliter per minute. How is the flow rate determined? The flow rate is in reference to the average flow velocity through the cross section area. To determine the flow rate, flow meters are used, which are based on different measuring principles. The PUMPselector offers an overview of a variety of pumps that cover any given flow rate demand. Back