GPM to LPM Converter
Convert US gallons per minute (GPM) to liters per minute (L/min) instantly. Type a value — the result updates as you type, and the swap button converts the other way.
GPM to L/min formula
L/min = GPM × 3.785411784
1 US gallon per minute = 3.79 liters per minute · 1 liter per minute = 0.2642 US gallons per minute
To convert US gallons per minute to liters per minute, multiply the value by 3.785411784. For example, 2.5 GPM:
L/min = 2.5 × 3.785411784L/min = 9.463529
So 2.5 GPM = 9.46 L/min.
Mental math shortcut
This conversion is exact, so there is no need to estimate: just multiply by 3.785412.
GPM to L/min conversion table
L/min back to GPM
The same values converted the other way, rounded for everyday use:
| Liters per minute | US gallons per minute |
|---|---|
| 1.89 L/min | 0.4993 GPM |
| 3.79 L/min | 1 GPM |
| 5.68 L/min | 1.5 GPM |
| 6.81 L/min | 1.8 GPM |
| 7.57 L/min | 2 GPM |
| 9.46 L/min | 2.5 GPM |
| 18.93 L/min | 5 GPM |
| 37.85 L/min | 10 GPM |
About the units
US gallons per minute (GPM)
US gallons per minute measures liquid flow, for example from pumps, faucets and showerheads.
Liters per minute (L/min)
Liters per minute is the metric unit of liquid flow rate.
Frequently asked questions
How many liters per minute are in a US gallon per minute?
One US gallon per minute equals 3.79 liters per minute.
What is 2.5 GPM in L/min?
2.5 GPM = 9.46 L/min.
How do I convert L/min back to GPM?
Divide the liters per minute by 3.785411784.