US Gallons to Liters

US Gallon

A US gallon (gal) is a common unit of volume used mainly in the United States for measuring liquids such as fuel, milk, and other beverages. One US gallon equals 4 quarts, 8 pints, or 128 fluid ounces, making it a practical size for everyday containers and large-scale liquid purchases. It’s widely recognized at gas stations and in grocery stores, where gallon jugs are frequently sold.

Because the US gallon differs from the Imperial gallon used in the UK, conversions can get confusing across countries. An online converter helps accurately translate gallons into liters or other units for travel, shopping, or cooking with international recipes.

Liter

A liter (L) is a common unit of volume in the metric system. It represents the amount of space that one cubic decimeter occupies, making it perfect for measuring liquids and everyday containers. You’ll see liters used for beverages, fuel, cleaning products, and anything that pours — from water bottles to milk cartons.

Because liters are part of the metric system, they convert cleanly with milliliters (1 L = 1000 mL) and cubic meters (1 m³ = 1000 L). When switching between metric and US or UK units — like gallons, cups, or fluid ounces — a conversion tool provides quick and accurate results, especially in cooking or travel.