Convert gallon (US)/second to liter/day [L/d] Online | Free flow Converter

Second [gal (US)/s]


Gallon per second (US) [gal (US)/s] is a unit of volumetric flow rate that measures the volume of liquid passing through a system every second, using the US liquid gallon as the standard. One US gallon equals approximately 3.785 liters, so gal (US)/s quantifies how many gallons flow each second, making it suitable for applications requiring very high flow rates. This unit is commonly used in hydraulics, large-scale water distribution, industrial processes, and emergency systems where rapid fluid movement must be monitored and controlled accurately. For instance, in water supply networks or dam releases, gal (US)/s helps engineers design pipelines, pumping stations, and valves to deliver large volumes of water efficiently. In industrial manufacturing, it regulates the flow of liquids in processes like cooling, chemical mixing, or fuel transfer, ensuring smooth and safe operation. Compared to gal/min or gal/h, gallon per second provides real-time measurement and control, enabling immediate response to changes in flow demand. Using gal (US)/s allows engineers, technicians, and managers to measure, manage, and optimize high-volume fluid flow, ensuring efficiency, safety, and reliable operation in critical municipal and industrial applications.


Day [L/d]


Liter per day (L/d) is a unit of volumetric flow rate that measures the amount of liquid passing through a system over a 24-hour period. One liter equals 1,000 cubic centimeters, so L/d quantifies how many liters of fluid flow or are consumed each day. This unit is widely used in water supply, wastewater management, agriculture, and medical applications to track daily fluid usage or delivery. For example, municipal water authorities often express household or industrial water consumption in L/d to plan supply, treatment, and storage efficiently. In agriculture, irrigation systems are designed based on the daily water requirements of crops, often calculated in liters per day. In healthcare, fluid intake or output for patients, such as intravenous fluids, is also monitored in L/d to ensure proper hydration and medical treatment. Compared to L/h, this unit provides a long-term perspective, suitable for planning and monitoring fluid systems over a full day. Using liters per day allows engineers, planners, and healthcare professionals to manage, optimize, and conserve fluid resources effectively, ensuring sustainability, efficiency, and reliability in both residential, agricultural, and industrial contexts.



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