VolumeGallons to Liters

Gallons to Liters

Snapshot

1 Gallon equals 3.785412 Liters. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.

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.
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

3.785412 Liters

Switch

Machine access

Available to apps and AI agents

Gallons to Liters 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: volume
Source unit: gallon_us
Target unit: liter

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": "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/"
  }
}

Full API documentation

Explanation

Use this page when you want a direct Gallons to Liters conversion. On this page, 1 Gallon equals 3.785412 Liters.

This route uses exact modern volume definitions, so the direct answer, calculator, table, and FAQ stay aligned for Gallons to Liters.

Gallons (gal): a US customary liquid-volume unit used for fuel, storage, and higher-capacity liquid measurement.

Liters (L): a metric volume unit equal to 1,000 milliliters, widely used for liquids, containers, and process quantities.

This route is useful when translating volume values across metric and US customary conventions so recipes, packaging, storage, and engineering references stay comparable.

This conversion is purely multiplicative because both units reduce through liters or cubic meters using fixed volume definitions with no offset.

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
0.25	0.946353
0.5	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.

What definition does this Gallons to Liters page use?

This route uses exact metric and US customary volume definitions, so the factor stays consistent across the direct answer, calculator, table, and FAQ.

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.