Gallons to Liters
Convert US gallons to liters. 1 US gallon = 3.78541 liters.
About This Calculator
Convert US gallons to liters. 1 US gallon = 3.78541 liters. Use the calculator above for instant results.
Worked Examples
Example 1: 10 gallons
- 10 × 3.78541 = 37.85 liters
Answer: 37.85 L
Example 2: 1 gallon
- 3.78541 liters | Standard US gallon
Answer: 3.785 L
Example 3: Gas tank: 15 gallons
- 15 × 3.785 = 56.78 liters
Answer: 56.78 L
Who Uses This Calculator?
Drivers
Convert tank size for international travel.
Home Cooks
Convert recipe liquid measurements.
Scientists
Fluid volume unit conversion.
Travelers
Understand fuel prices abroad.
Common Mistakes to Avoid
❌ US vs Imperial gallon
US gallon = 3.785 L. UK imperial gallon = 4.546 L. Very different! US fuel economy (mpg) uses US gallons.
❌ Liters vs milliliters
1 liter = 1000 mL. A standard water bottle is 500 mL = 0.5 L.
Frequently Asked Questions
Gallons to liters?
Multiply by 3.78541. 1 gallon = 3.785 L.
Liters to gallons?
Divide by 3.78541. 1 L = 0.2642 gallons.
Fuel economy: L/100km vs mpg?
Divide 235.21 by mpg to get L/100km. 30 mpg = 7.84 L/100km.