15.8503
US gal/min
951.02
US gal/h
22,824.47
US gal/day
3.6
m³/h
15.8503
US gal/min
951.02
US gal/h
22,824.47
US gal/day
3.6
m³/h
The Liters per Second to Gallons per Minute Converter provides instant, accurate conversion between L/s and GPM (gallons per minute). The conversion factor is 1 L/s = 15.8503 GPM. This is one of the most frequently needed flow rate conversions, bridging metric and US customary measurement systems in hydraulic engineering and plumbing.
Liters per second (L/s) is the standard flow rate unit in most of the world and in international engineering standards, while gallons per minute (GPM) is the dominant unit in the United States for plumbing, fire protection, irrigation, and HVAC applications. Engineers working on international projects must frequently convert between these units.
The conversion is based on the definition of the US liquid gallon = 3.785411784 liters (exact). Since 1 minute = 60 seconds, the conversion factor is 60/3.785411784 = 15.8503 GPM per L/s. Note that the US gallon differs from the imperial (UK) gallon (4.54609 liters).
Common applications include: pump specifications (European pumps rated in L/s, American pumps in GPM), fire protection systems (NFPA codes use GPM, ISO codes use L/min), water treatment plants (process flows often in L/s, equipment catalogs in GPM), and irrigation design (drip systems in L/hr, sprinkler systems in GPM).
Typical flow rates: a kitchen faucet delivers about 0.13 L/s (2 GPM), a fire sprinkler head about 0.95 L/s (15 GPM), and a fire hydrant about 63 L/s (1,000 GPM). Municipal water mains may carry hundreds of L/s.
The formula is: GPM = L/s x 15.8503 (or more precisely, L/s x 60 / 3.785411784). The converter also provides gallons per hour (GPH = GPM x 60) for applications like fuel consumption and chemical dosing.
This conversion uses the US liquid gallon (3.785411784 L). If you need imperial (UK) gallons, use the factor 1 L/s = 13.1981 imperial GPM instead. Always verify which gallon definition is required.
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Standard faucet flow = ~2 GPM
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Results
63 L/s = ~1000 GPM
1 liter per second = 15.8503 US gallons per minute. This conversion uses the US liquid gallon (3.785411784 liters).
GPM = L/s x 15.8503 (exactly: L/s x 60 / 3.785411784). Multiply liters per second by 15.85 for a quick estimate.
This converter uses US liquid gallons (3.785411784 L). For imperial (UK) gallons (4.54609 L), 1 L/s = 13.1981 imperial GPM.
Household: faucet 0.1-0.2 L/s, shower 0.15 L/s. Municipal: fire hydrant 30-100 L/s. Industrial: treatment plant 100-1000+ L/s.
GPM is the traditional unit in US plumbing codes and fixture specifications. Most US plumbing codes, including the Uniform Plumbing Code and International Plumbing Code, specify flow rates in GPM.
Divide GPM by 15.8503 (or multiply by 0.0631). For example, 10 GPM = 0.631 L/s.
NFPA 13 typically requires 15-40 GPM (0.95-2.52 L/s) per sprinkler head for ordinary hazard occupancies, depending on the design density.
The L/s to GPM conversion factor is constant regardless of altitude. However, actual flow through a system may change at altitude due to lower atmospheric pressure affecting pump performance.
A typical garden hose delivers 5-10 GPM (0.32-0.63 L/s) depending on hose diameter, length, and water pressure.
Yes, the unit conversion factor is the same for gases. However, gas flow rates are often specified at standard conditions (STP), so ensure both values use the same reference conditions.
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