Unit Converter - Flow Converter

Flow Rate Units

The flow converter enables quick conversion between common volumetric flow rate units. It is useful for water, sewer, ventilation, gas, and process calculations where the same flow may be given in m³/h, l/s, l/min, or imperial units.

Overview of Flow Rate Units

• Cubic meters per second [m³/s]: the SI unit of volumetric flow rate, describing one cubic meter passing in one second.
• Cubic meters per hour [m³/h]: commonly used in ventilation, gas, and industrial installations. 1 m³/h equals 1/3600 m³/s.
• Cubic decimeters per second [dm³/s]: equivalent to liters per second, often used in hydraulics and sanitary systems.
• Cubic decimeters per minute [dm³/min]: equivalent to liters per minute and convenient for smaller liquid flows.
• Liters per second [l/s]: a common design unit for water, wastewater, and air flow. 1 l/s equals 0.001 m³/s.
• Liters per minute [l/min]: used for fittings, pumps, flow meters, and sanitary equipment.
• Liters per hour [l/h]: useful for small continuous flows, dosing, and process systems.
• Cubic centimeters per second [cm³/s]: used for small laboratory and precision flows.
• Milliliters per second [ml/s]: equivalent to cm³/s and used for very small volumetric flows.
• Cubic feet per second [ft³/s]: an imperial flow unit used in engineering and hydrology.
• Cubic feet per minute [ft³/min]: the CFM unit commonly used in ventilation, compressed air, and HVAC.
• US gallons per minute [gal/min]: the GPM unit used mainly in the United States for pumps, water systems, and liquid flows.
• US gallons per hour [gal/h]: used for smaller liquid flows and fuel consumption.

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