gallon (US)/second Unit Converter

Definition of gallon (US)/second unit

US gallon per second is a volumetric flow-rate unit representing the movement of one US liquid gallon of fluid every second. It equals approximately 0.00378541 cubic meters per second, or 3.78541 liters per second.

History of gallon (US)/second unit

The gallon is an old unit of volume with several historical forms, but the United States standardized its liquid gallon in the nineteenth century from the Queen Anne wine gallon, defined as 231 cubic inches. Combining this volume with the second, an SI unit of time, produced gallon-per-second as a practical rate expression. Although metric units later became internationally preferred, US customary flow units remained common in American engineering, water management, petroleum measurement, and industrial specifications. The unit is therefore a derived customary measure rather than an ancient volume standard.

Applications of gallon (US)/second unit

US gallon per second is used in American water-resource and civil-engineering work to describe river discharge, pumping capacity, pipeline throughput, and stormwater flow. For example, a pump rated at 100 gallons per second delivers 378.5 liters per second. It also appears in irrigation, wastewater treatment, firefighting, mining, and industrial process specifications where customary units remain standard.

Complete list of gallon (US)/second unit conversion