Real-time conversion between US/UK gallons, liters, pints, quarts and more.
Gallon is a volume unit used in the United States and United Kingdom, but the two countries use different gallon sizes. US gallon is 3.785 liters, while UK/Imperial gallon is 4.546 liters. The US gallon is about 17% smaller than the UK gallon.
The formula to convert US gallons to liters is L = US gal × 3.785411784. The exact conversion factor is 3.785411784, but 3.785 is commonly used in daily life. 5 US gallons equals 5 × 3.785 = 18.925 liters.
In the US volume system, 1 gallon = 4 quarts, 1 quart = 2 pints, 1 pint = 16 fluid ounces (fl oz). Therefore, 1 gallon = 8 pints = 128 fluid ounces.
US vehicle fuel tank capacity is displayed in gallons. Compact cars typically have 12-15 gallons (45-57 liters), mid-size sedans 15-18 gallons (57-68 liters), and SUVs 18-26 gallons (68-98 liters).