VolumeGallons to Liters

Gallons to Liters

Methodology·How We Verify

Snapshot

1 Gallon equals 3.785412 Liters.

Reference basis: This conversion uses exact modern volume definitions anchored to liters or cubic meters.
Example: For 0.1 Gallons, the result equals 0.378541 Liters.

Interactive conversion

Converter Calculator

Decimals: 1.5 or 1,5. Fractions: 1/2. Scientific notation: 1e3. Write 1000 without grouping separators.

3.785412 Liters

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API and AI agent access

Gallons to Liters.

Machine-readable identifiers

Conversion family: volume
Source unit: gallon_us
Target unit: liter

Use these identifiers in the API request. Sources and model limits also apply to software clients.

Example API request and response

POST /api/v1/convert

Request

{
  "family": "volume",
  "value": 1,
  "from": "gallon_us",
  "to": "liter"
}

Essential response

{
  "ok": true,
  "conversion": {
    "family": "volume",
    "value": 1,
    "from": "gallon_us",
    "to": "liter",
    "result": {
      "raw": 3.7854117839999994,
      "display": "3.785412"
    },
    "canonicalPath": "/volume/gallons-to-liters/"
  }
}

API, OpenAPI and WebMCP documentation

Explanation

Convert gallons to milliliters (×3785.411784), then divide by 1000 to return liters.

Method & Reference

Method basis: exact conversion formula shown in Snapshot.
Applied factor: 1 Gallon = 3.785412 Liters (using exact modern volume definitions anchored to liters or cubic meters).
Consistency rule: calculator output and table values use the same constants and rounding policy.

Common Conversion Values

Gallons	Liters
0.1	0.378541
1/4	0.946353
1/2	1.892706
1	3.785412
2	7.570824
5	18.927059
10	37.854118
25	94.635295
50	189.270589
100	378.541178

Questions & answers

Frequently Asked Questions

What is 1 gallon in liters?

1 Gallon equals 3.785412 Liters on this page.

Is there a reverse Liters to Gallons page?

Use the mirror Liters to Gallons page to switch the direction while keeping the same fixed volume definitions.