Flow RateGallons per Minute US to Liters per Minute

Gallons per Minute (US) to Liters per Minute

Snapshot

1 Gallon per Minute (US) equals 3.785 Liters per Minute. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

Reference basis: This conversion uses a fixed factor based on time-normalized rate definitions.
Example: For 0.1 Gallons per Minute (US), the result equals 0.378541 Liters per Minute.
Use the reverse page if you need the opposite direction with the same basis.

Use the interactive calculator below for custom values and the common-value table for quick checks.

Interactive conversion

Converter Calculator

3.785 Liters per Minute (L/min)

Switch

Machine access

Available to apps and AI agents

Gallons per Minute (US) to Liters per Minute can be requested through Conversion Encyclopedia's structured interfaces by software and compatible AI agents. The identifiers below select the same calculation as the calculator.

Machine-readable identifiers

Conversion family: flow-rate
Source unit: gallons_per_minute_us
Target unit: liters_per_minute

The JSON API and OpenAPI specification use the identifiers to reach the conversion engine. WebMCP lets compatible AI agents request the same calculation.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "flow-rate",
  "value": 1,
  "from": "gallons_per_minute_us",
  "to": "liters_per_minute"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "flow-rate",
    "value": 1,
    "from": "gallons_per_minute_us",
    "to": "liters_per_minute",
    "result": {
      "raw": 3.7854117839999994,
      "display": "3.785"
    },
    "canonicalPath": "/flow-rate/gallons-per-minute-us-to-liters-per-minute/"
  }
}

Full API documentation

Explanation

Formula: Liters per Minute = Gallons per Minute (US) × 3.785. Why: the route uses liters per second as the common basis, then applies the fixed US gallon definition together with the relevant per-minute or per-hour time scaling.

Gallons per Minute (US) (gpm): a US customary volumetric flow unit based on the US liquid gallon and commonly used in pumps, piping, and water systems.

Liters per Minute (L/min): a practical volumetric flow unit commonly used for pumps, plumbing, dosing, and process equipment.

This route is useful when translating between SI flow units and gallon- or cubic-foot-based reporting for pumps, piping, ventilation, and plant documentation.

This conversion is purely multiplicative because both units reduce through one liters-per-second flow basis with fixed unit-volume definitions and no offset.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Gallon per Minute (US) = 3.785 Liters per Minute.
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Gallons per Minute (US) (gpm)	Liters per Minute (L/min)
0.1	0.378541
0.5	1.893
1	3.785
5	18.927
10	37.854
25	94.635
50	189.271
100	378.541
1,000	3,785.41

Questions & answers

Frequently Asked Questions

What is 1 gallon per minute (us) in liters per minute?

1 Gallon per Minute (US) equals 3.785 Liters per Minute on this page.

Does this Gallons per Minute (US) to Liters per Minute page use the US gallon standard?

Yes. Where US gallon units appear, this page uses the fixed US liquid gallon definition and keeps that standard aligned across the direct answer, calculator, and common values table.

When would I convert gallons per minute (us) to liters per minute?