Vehicle tank
Input: 12 gallons
Output: 45.425 liters
12 x 3.785411784 = 45.424941408 liters.
gallons to liters converter
Convert US gallons to liters for fuel, tank, and kitchen volume references.
Liters:
Formula and algorithm
- liters = US gallons x 3.785411784
- Constant used: 1 US gallon = 3.785411784 liters (exact).
- This is the inverse of liters to US gallons conversion.
Worked examples
Small can
Input: 1.5 gallons
Output: 5.678 liters
1.5 x 3.785411784 = 5.678117676 liters.
One gallon check
Input: 1 gallon
Output: 3.785 liters
1 x 3.785411784 = 3.785411784 liters.
FAQ
Can I use this for imperial gallons?
No. This page is specific to US gallons only.
How many liters in 5 US gallons?
5 US gallons equals 18.92705892 liters.
Is the factor exact?
Yes. The US gallon to liter factor here is exact.
Related tools
Updated: June 7, 2026