Flow Rate Converter
Convert volumetric flow rates — litres per minute, gallons per minute, cubic metres per hour, CFM and more.
Convert flow rate units
This flow rate converter handles volumetric flow — how much liquid or gas moves per unit of time. It covers litres per second, minute and hour, cubic metres per hour, US gallons per minute (GPM) and hour, and cubic feet per minute (CFM) and second. It is useful for pumps, plumbing, HVAC, irrigation, and engineering.
Common flow rate conversions
| From | To | Result |
|---|---|---|
| 1 CFM | GPM | 7.481 GPM |
| 1 L/s | L/min | 60 L/min |
| 1 m³/h | L/min | 16.67 L/min |
| 1 GPM | L/min | 3.785 L/min |
CFM and GPM explained
CFM (cubic feet per minute) is the standard measure for airflow in fans, compressors, and ventilation. GPM (gallons per minute) measures liquid flow in pumps and plumbing. This tool converts between them and the metric equivalents so you can compare equipment specs from different regions.
Litres per hour to GPM
Litres per hour (L/h) is common on small pumps, drip irrigation and dosing equipment specs, while GPM (US gallons per minute) is the standard on North American pump datasheets. To convert, divide by 227.12: 1 US gallon per minute equals 227.12 litres per hour, so 500 L/h is about 2.2 GPM, and 1,000 L/h is about 4.4 GPM. Enter your figure in the converter above with “Litres/hour (L/h)” as the From unit and “US gallons/minute (GPM)” as the To unit for an exact result.
Frequently asked questions
How many GPM is 1 CFM?
One cubic foot per minute equals about 7.48 US gallons per minute.