Gallons to Liters

Convert gallons to liters instantly. Free online gallon to liter converter for fuel, cooking, and liquids.

The Gallons to Liters converter bridges American and metric volume measurements for fuel, beverages, and general liquid calculations. When traveling internationally, comparing fuel efficiency, or adapting American recipes, accurate gallon to liter conversions are essential. This tool uses the US gallon standard to provide instant liter equivalents for all your conversion needs.

Converter

3.78541

Formula: L = gallons × 3.78541

Common use cases

  • Fuel consumption comparisons
  • Recipe scaling for international use
  • Swimming pool volume calculations
  • Paint and chemical quantities
  • Agricultural liquid measurements

How to use

  1. Enter the volume in gallons
  2. View the liter equivalent instantly
  3. Use for fuel or liquid conversions
  4. Copy results for your calculations
  5. Clear for new conversions

FAQ

How many liters are in a gallon?

One US gallon equals approximately 3.785 liters.

Is this for US or UK gallons?

This converter uses US gallons. UK imperial gallons are larger (4.546 liters).

How do I compare fuel efficiency?

Convert mpg to L/100km: L/100km = 235.215 ÷ mpg. Our converter helps with the volume conversion.

Why is the gallon still used?

The US gallon remains standard for fuel sales, pool measurements, and large liquid quantities in the United States.