L/s to GPM Volumetric Flow Rate Conversion Chart
| Liter per second (L/s) | Gallon per minute (US) (gpm) | Reference Benchmark | Formula Step |
|---|---|---|---|
| 0.1 L/s | 1.59 gpm | Laboratory Benchtop Column Chromatography Eluent Flow | 0.1 × 15.850323 = 1.585 GPM |
| 0.2 L/s | 3.17 gpm | Residential Building Drinking Water Filter Backwash | 0.2 × 15.850323 = 3.17 GPM |
| 0.5 L/s | 7.93 gpm | Domestic Continuous Hot Water Circulation Loop | 0.5 × 15.850323 = 7.925 GPM |
| 1 L/s | 15.85 gpm | Commercial Building Sanitary Water Service Sub-Feed | 1 × 15.850323 = 15.85 GPM |
| 2 L/s | 31.7 gpm | Hydronic Heating Primary Boiler Circulation Header | 2 × 15.850323 = 31.7 GPM |
| 5 L/s | 79.25 gpm | Agricultural Drip Irrigation Lateral Zone Supply | 5 × 15.850323 = 79.25 GPM |
| 10 L/s | 158.5 gpm | Commercial HVAC Central Chilled Water Header Pump | 10 × 15.850323 = 158.5 GPM |
| 15 L/s | 237.75 gpm | Industrial Food Processing Liquid Blending Stream | 15 × 15.850323 = 237.75 GPM |
| 20 L/s | 317.01 gpm | Municipal Water Treatment Sand Filter Inflow Header | 20 × 15.850323 = 317.01 GPM |
| 25 L/s | 396.26 gpm | Commercial Building Automatic Fire Sprinkler Riser | 25 × 15.850323 = 396.26 GPM |
| 50 L/s | 792.52 gpm | Industrial Wastewater Clarifier Sludge Return Pump | 50 × 15.850323 = 792.52 GPM |
| 75 L/s | 1188.77 gpm | Thermal Power Station Auxiliary Cooling Water Line | 75 × 15.850323 = 1188.77 GPM |
| 100 L/s | 1585.03 gpm | Municipal Potable Water Pumping Booster Main | 100 × 15.850323 = 1585.03 GPM |
| 200 L/s | 3170.06 gpm | Regional Canal Irrigation Primary Diversion Gate | 200 × 15.850323 = 3170.06 GPM |
| 500 L/s | 7925.16 gpm | Municipal Stormwater Flood Control Drainage Channel | 500 × 15.850323 = 7925.16 GPM |
Liter per second to Gallon per minute (US) Formula & Unit Definitions
The conversion ratio reflects both the metric-to-customary liquid volume relationship and the 60-second time scalar. Because one second contains 1/60 of a minute, flowing one liter every second yields 60 liters per minute. Dividing 60 liters by 3.785411784 liters per US gallon produces exactly 15.85032314 (~15.850323 GPM). Multiplying any flow rate in liters per second by 15.850323 gives the precise equivalent in US gallons per minute.
Quick Estimation: Quick mental shortcut: To convert L/s to GPM in your head, multiply the L/s by 16 and subtract roughly 1%. For example, 10 L/s × 16 = 160; subtract 1% gives 158.4 GPM (exact: 158.50 GPM); 5 L/s × 16 = 80; subtract 1% gives 79.2 GPM (exact: 79.25 GPM).
Liter per second — L/s
SI Metric Standard- Standard coherent metric unit for high-velocity discharge (1 L/s = 1 cubic decimeter per second)
- Primary design standard for European civil hydraulics, pipeline fluid dynamics, and process plants
- Directly equivalent to 60 liters per minute and approximately 15.850323 US gallons per minute
Gallon per minute — GPM
US Customary Flow- Standard US engineering unit for liquid flow rate (1 GPM = 231 cubic inches per minute)
- Universal metric across American plumbing codes, fire protection, and hydronic HVAC schedules
- Equivalent to approximately 0.0630902 liters per second (based on the US liquid gallon)
Frequently Asked Questions
Q.How do you convert liters per second to GPM accurately?
Multiply the flow rate in liters per second by 15.850323 (or divide by 0.0630902). For example, 10 L/s × 15.850323 = 158.50 GPM.
Q.What is the reverse conversion from GPM to liters per second?
To convert back, use the GPM to Liters per Second Converter where 1 GPM equals approximately 0.0630902 L/s.
Q.How many gallons per minute are in one liter per second?
One liter per second equals approximately 15.850323 US gallons per minute (GPM).
Q.What is 25 L/s in gallons per minute?
25 liters per second equals approximately 396.26 GPM, a standard capacity for commercial fire protection and industrial cooling systems.