US gallons per minute to Litres per minute Converter GPM → L/min

1 us gallon per minute (GPM) = 3.785411784 litres per minute (L/min). Type a value below — the conversion happens instantly, entirely on your device.

From

1 GPM = 3.785411784 L/min

Precision

5 US gallons per minute = 18.927059 litres per minute

5 × 3.78541 = 18.927059

1 GPM equals 3.78541 L/min, so multiplying by 3.78541 converts the value. The result describes the exact same quantity — only the measuring stick changes.

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How to convert US gallons per minute to litres per minute

litres per minute = US gallons per minute × 3.785411784 — multiply the us gallon per minute value by 3.78541.

Example: 5 GPM = 18.9271 L/min.

To convert the other way: US gallons per minute = litres per minute ÷ 3.785411784 — or use the dedicated L/min to GPM converter .

US gallons per minute to litres per minute multiplies by about 3.785: a 5 GPM pump delivers about 18.9 L/min. Use it to compare a US-rated pump against metric fixture demands.

US gallons per minute to Litres per minute conversion table

US gallons per minute (GPM)	Litres per minute (L/min)
0.1	0.37854118
0.25	0.94635295
0.5	1.8927059
1	3.7854118
2	7.5708236
3	11.356235
4	15.141647
5	18.927059
6	22.712471
7	26.497882
8	30.283294
9	34.068706
10	37.854118
15	56.781177
20	75.708236
25	94.635295
30	113.56235
40	151.41647
50	189.27059
75	283.90588
100	378.54118
250	946.35295
500	1892.7059
1000	3785.4118

About the units

What is a us gallon per minute?

US gallons per minute — the standard US pump and plumbing rate. One GPM is about 3.785 L/min.

What is a litre per minute?

A litre per minute is 1/60 L/s. Taps, showers and small pumps are rated in L/min.

Frequently asked questions

How many litres per minute are in 1 us gallon per minute?

1 us gallon per minute (GPM) = 3.785411784 litres per minute (L/min).

What is the formula to convert US gallons per minute to litres per minute?

litres per minute = US gallons per minute × 3.785411784 — multiply the us gallon per minute value by 3.78541.

How do I convert GPM to L/min without a calculator?

Multiply by 3.79 for a close estimate. Exact factor: 1 GPM = 3.785411784 L/min.

Is this GPM-to-L/min converter accurate and private?

Yes. It uses the exact internationally defined conversion factors and computes results locally in your browser — your input is never sent to a server, and the page keeps working offline.