Direct conversion
Convert gallon (US) per minute [gpm] to liter per minute [L/min] instantly with formula, examples, chart, and FAQs.
Quick answer
Use the calculator below for any custom value, then check the formula, examples, chart, and reverse conversion links.
1 gallon (US) per minute [gpm] = 3.785412 liter per minute [L/min]
1 gallon (US) per minute [gpm] = 3.785412 liter per minute [L/min]
Example: 1 gallon (US) per minute [gpm] equals 3.785412 liter per minute [L/min].
Flow rate conversions use cubic meter per second as the reference unit and include common pump, plumbing, HVAC, and process-flow units.
Displayed results are rounded for readability. The calculator keeps enough precision for everyday use and switches to scientific notation for very large or very small values. Last reviewed: 2026-05-21.
US gallons per minute measures volume flow rate in US liquid gallons each minute.
HistoryGPM developed from customary liquid volume measurement used in plumbing and pumping.
Current useGPM is used for faucets, pumps, fire protection, irrigation, pools, and water-treatment systems.
Liters per minute measures volume flow rate through a system each minute.
HistoryThe unit follows metric volume and time measurement for practical fluid-flow values.
Current useL/min is used for pumps, plumbing, irrigation, medical oxygen, lab equipment, and industrial flow.
| gallon (US) per minute [gpm] | liter per minute [L/min] |
|---|---|
| 1 | 3.785412 |
| 2 | 7.570824 |
| 5 | 18.927059 |
| 10 | 37.854118 |
| 20 | 75.708236 |
| 25 | 94.635295 |
| 50 | 189.270589 |
| 100 | 378.541178 |
| 1000 | 3785.411784 |
Use this formula: 1 gallon (US) per minute [gpm] = 3.785412 liter per minute [L/min] Enter your value in the calculator and the result updates instantly.
1 gallon (US) per minute [gpm] equals 3.785412 liter per minute [L/min].
Yes. Use the swap button in the calculator or open the related reverse conversion link when it is listed on this page.