Convert volumetric flow rate between m³/s, m³/h, L/s, L/min, ft³/min, gpm and gal/h with exact factors. Free, accurate online tool.
Volumetric flow rate measures the volume of a fluid that passes through a cross-section in a given time interval. It is a fundamental quantity in hydraulics, sanitation, process industries and any system that moves liquids or gases, from a residential water pump to an oil pipeline. The International System unit is the cubic metre per second (m³/s), but in practice the most commonly used units vary according to context and country. In Brazil and much of the metric world, the litre per minute (L/min) and the cubic metre per hour (m³/h) are the most common units in pump catalogues, water meters and equipment specifications. Conversion between them is straightforward: 1 m³/s equals 60 m³/min and 3600 m³/h; 1 L/s equals 0.001 m³/s; 1 L/min equals 0.000016666666666666666 m³/s; and 1 L/h equals 2.777777777777778e-7 m³/s. These factors, verified against the unit catalogue of this converter, ensure consistent results. In systems that follow North American standards, the cubic foot per second (ft³/s), the cubic foot per minute (ft³/min, known as CFM) and the gallon per minute (gpm) predominate. The equivalences are: 1 ft³/s equals 0.0283168 m³/s; 1 ft³/min equals 0.00047194666666666664 m³/s; 1 gal/s equals 0.00378541 m³/s; 1 gal/min equals 0.00006309016666666666 m³/s; and 1 gal/h equals 0.0000010515027777777777 m³/s. The gallon considered is the US gallon of 3.78541 litres. Precision in flow rate conversion is essential in real projects. An engineer sizing a pump needs to know exactly how many litres per minute it must deliver; an air conditioning technician calculates the CFM required to renew the air in a room; an irrigation designer converts between m³/h and gpm when using imported components. A factor error can mean an undersized pump, insufficient ventilation or an overflowing reservoir. This converter applies all these factors locally in your browser, updating the result instantly as you type. It is completely free, with no registration and no conversion limit, ideal for both technical and everyday use.
Multiply the value in m³/h by 16.6667. For example, 1 m³/h equals approximately 16.67 L/min.
1 litre per second equals 0.001 cubic metre per second.
Multiply the value in US gallons per minute by 3.78541. For example, 10 gpm equals 37.85 L/min.
CFM stands for cubic feet per minute, a flow unit common in ventilation and air conditioning. 1 ft³/min equals 0.00047194666666666664 m³/s.
Yes, completely free, with no registration and no daily conversion limit.