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Quick Converters
GPM ↔ L/min Converter
Convert between US Gallons per Minute (GPM) and Litres per Minute (L/min) water flow units instantly. Also shows the L/s equivalent for hydronic system calculations.
GPM to L/min Conversion
1 US GPM = 3.78541 L/min. To convert GPM to L/min, multiply by 3.78541. To convert L/min to GPM, divide by 3.78541.
Note: US gallons differ from imperial gallons. 1 imperial gallon = 4.54609 litres, while 1 US gallon = 3.78541 litres. Always confirm which gallon is being used.
Frequently Asked Questions
How many L/min is 10 GPM?
10 US GPM = 37.85 L/min. Multiply GPM by 3.78541 to get L/min.
Are US and imperial gallons the same?
No. 1 US gallon = 3.785 litres, while 1 imperial gallon = 4.546 litres. Always check which system is being used, especially in older UK specifications.
GPM ↔ L/min Converter
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