Gallon-Liter Converter
Real-time conversion between US/UK gallons, liters, pints, quarts and more.
Conversion Factors
1 US Gallon
= 3.785 L
1 UK Gallon
= 4.546 L
1 US Quart
= 0.946 L
1 US Pint
= 473 mL
1 Fluid Ounce
= 29.6 mL
1 Liter
= 0.264 US gal
Complete Gallon-Liter Conversion Guide (2025)
01
Difference Between Gallons and Liters
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.
02
Gallon-Liter Conversion Formulas
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.
03
Relationship of Quarts, Pints, and Ounces
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.
04
Vehicle Fuel Capacity and MPG Calculation
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).