US gallons per minute to Liters per minute Converter
1 GPM equals 3.7854118 L/min, and 1 L/min equals 0.26417205 GPM. Enter a value in either box to convert us gallons per minute to liters per minute and back. Formula: cubic meters per second = value x unit factor (1 GPM = 3.785411784 L / 60 s; 1 m3/h = 1/3,600 m3/s).
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1 GPM = 3.7854118 L/min
Results shown are estimates for informational purposes only. Nothing on CalcFlow is financial, tax, legal, or medical advice. Always consult a qualified professional before making important decisions.
US gallons per minute to Liters per minute Conversion Table
| US gallons per minute | Liters per minute |
|---|---|
| 1 GPM | 3.7854118 L/min |
| 2 GPM | 7.5708236 L/min |
| 5 GPM | 18.927059 L/min |
| 10 GPM | 37.854118 L/min |
| 20 GPM | 75.708236 L/min |
| 50 GPM | 189.27059 L/min |
| 100 GPM | 378.54118 L/min |
| 500 GPM | 1,892.7059 L/min |
| 1,000 GPM | 3,785.4118 L/min |
Liters per minute to US gallons per minute Conversion Table
| Liters per minute | US gallons per minute |
|---|---|
| 1 L/min | 0.26417205 GPM |
| 2 L/min | 0.5283441 GPM |
| 5 L/min | 1.3208603 GPM |
| 10 L/min | 2.6417205 GPM |
| 20 L/min | 5.283441 GPM |
| 50 L/min | 13.208603 GPM |
| 100 L/min | 26.417205 GPM |
| 500 L/min | 132.08603 GPM |
| 1,000 L/min | 264.17205 GPM |
Worked example: 10 GPM = 37.854118 L/min. A pump rated at 10 GPM moves 10 x 3.785411784 = 37.85 liters per minute, which is 2.27 cubic meters per hour.
Need other units? Open the full Flow Rate Converter.
Popular Flow Rate Conversions
Formula
cubic meters per second = value x unit factor (1 GPM = 3.785411784 L / 60 s; 1 m3/h = 1/3,600 m3/s)Understanding Flow Rate Conversion
Flow rate is volume per unit of time. Plumbing and pumps in the US are rated in gallons per minute, while metric plumbing uses liters per minute or cubic meters per hour. Air handling uses cubic feet per minute, and rivers are measured in cubic meters or cubic feet per second. The same number means different things for US and UK gallons, so check which one a pump label uses.
Tips and Best Practices
- 1Multiply US gallons per minute by 3.785 to get liters per minute.
- 2Divide cubic meters per hour by 3.6 to get liters per second.
- 3Shower heads in the US are limited to about 2.5 GPM, roughly 9.5 L/min.
Real-World Example
A pump rated at 10 GPM moves 10 x 3.785411784 = 37.85 liters per minute, which is 2.27 cubic meters per hour.
Common Mistakes to Avoid
- Mixing US and UK GPM.
- Confusing m3/h with m3/s, a factor of 3,600.
- Reading a pump curve at the wrong head or pressure rather than the quoted flow.
How to Use
- Type a number in the US gallons per minute box.
- The Liters per minute result appears instantly; you can also edit the Liters per minute box to convert backwards.
- Use the swap button to reverse the direction and Copy result to copy the answer.
Frequently Asked Questions
How many liters per minute are in 1 GPM?
How many us gallons per minute are in 1 L/min?
What is the formula to convert us gallons per minute to liters per minute?
How do I convert m3/h to L/min?
Sources: NIST SP 811 (US gallon, cubic foot); UK imperial gallon = 4.54609 L.