US gallons to litres
Type a value in either box. 1 gal (US) = 3.785412 L.
Last updated
How to convert
To convert US gallons to litres, multiply by 3.785412.
L = gal (US) × 3.785412
For example: 12 gal (US) × 3.785412 = 45.4249 L.
A US gallon is defined as exactly 3.785411784 litres.
In your head: Multiply by 3.8: 5 US gallons ≈ 19 litres (exactly 18.93 L).
When you’ll need it
American recipes, paint and water jugs use US gallons. The big bottle on an office water cooler is 5 US gallons, about 18.9 litres.
Common values
| US gallons (gal (US)) | Litres (L) |
|---|---|
| 0.5 gal (US) | 1.8927 L |
| 1 gal (US) | 3.7854 L |
| 2 gal (US) | 7.5708 L |
| 3 gal (US) | 11.3562 L |
| 5 gal (US) | 18.9271 L |
| 10 gal (US) | 37.8541 L |
| 12 gal (US) | 45.4249 L |
| 15 gal (US) | 56.7812 L |
| 20 gal (US) | 75.7082 L |
| 50 gal (US) | 189.2706 L |
| 100 gal (US) | 378.5412 L |
| 1,000 gal (US) | 3,785.4118 L |
Questions
- How many litres are in a US gallon?
- 1 US gallon is 3.785412 litres.
- What is the formula to convert US gallons to litres?
- L = gal (US) × 3.785412. A US gallon is defined as exactly 3.785411784 litres.
- What is 12 US gallons in litres?
- 12 US gallons is 45.4249 litres.
- Is a US gallon the same as a UK gallon?
- No. A US gallon is 3.785411784 litres, while a UK (imperial) gallon is 4.54609 litres, about 20% bigger. This page uses US gallons; there is a separate litres to UK gallons converter.