The conversion from Gallon Per Hour (GPH) to Cubic Meter Per Hour (m³/h) is a crucial measurement in various fields, including engineering, architecture, and environmental science. Gallon Per Hour is a unit of volumetric flow rate, representing the volume of fluid (liquid or gas) that flows through a given area in one hour. On the other hand, Cubic Meter Per Hour is a metric unit of volumetric flow rate, measuring the volume of fluid that passes through a specific area in one hour. To convert GPH to m³/h, we multiply the GPH value by 0.00378541, as one gallon is approximately equal to 0.00378541 cubic meters. This conversion is essential in calculating the flow rates of liquids, gases, and other fluids in various applications, such as water treatment, HVAC systems, and industrial processes.