All Flow Rate Units

How to Convert Flow Rate Units?

Flow rate measures the volume of fluid passing through a point per unit of time. Converting between flow rate units requires understanding the relationship between volume units (liters, gallons, cubic meters) and time units (seconds, minutes, hours). Our converter uses precise conversion factors to ensure accurate results for engineering, plumbing, and industrial applications.

Units

Liter per Minute (L/min)

The most common flow rate unit for residential and small-scale applications. Used for water pumps, aquarium filters, and small fluid systems. 1 L/min equals approximately 0.264 gallons per minute.

Gallon per Minute (gal/min or GPM)

Standard flow rate unit in the United States for plumbing, firefighting, and HVAC systems. One US gallon per minute equals 3.785 liters per minute. Essential for sizing pumps and pipes in American specifications.

Cubic Meter per Hour (m³/h)

Industrial standard for large-scale fluid flow measurement. Commonly used in water treatment plants, chemical processing, and large HVAC systems. 1 m³/h equals 16.67 liters per minute.

Liter per Second (L/s)

Preferred unit in scientific research and engineering calculations. Used in hydrology, irrigation systems, and wastewater management. 1 L/s equals 60 L/min or 15.85 gallons per minute.

Cubic Foot per Minute (ft³/min or CFM)

Common in the US for measuring air flow in ventilation, air compressors, and pneumatic systems. Also used for natural gas flow measurements. 1 CFM equals approximately 28.32 liters per minute.

Common Flow Rate Conversions