How to convert US gallons to liters
1 US gal = 231 in³ = 3.785411784 L (exact)
liters = US gallons × 3.785411784
Shortcut: Multiply by 4 and subtract 5%: 10 gal ≈ 40 − 2 = 38 L (exactly 37.85).
Gallons to liters table
| US gallons | Liters |
|---|---|
| 0.25 US gal | 0.9464 L |
| 0.5 US gal | 1.8927 L |
| 1 US gal | 3.7854 L |
| 2 US gal | 7.5708 L |
| 3 US gal | 11.3562 L |
| 5 US gal | 18.9271 L |
| 10 US gal | 37.8541 L |
| 12 US gal | 45.4249 L |
| 15 US gal | 56.7812 L |
| 20 US gal | 75.7082 L |
| 25 US gal | 94.6353 L |
| 30 US gal | 113.5624 L |
| 40 US gal | 151.4165 L |
| 50 US gal | 189.2706 L |
| 55 US gal | 208.1976 L |
| 100 US gal | 378.5412 L |
Values are calculated with exact factors and rounded for the table; the converter above shows full precision.
Worked examples
1 US gal to liters
1 × 3.785411784
3.7854 L
5 US gal to liters
5 × 3.785411784
18.9271 L
55 US gal to liters
55 × 3.785411784
208.1976 L
Questions
How many liters is 1 gallon?
A US gallon is exactly 3.785411784 liters, about 3.79 L.
How many liters is 5 gallons?
About 18.93 liters.
Is a UK gallon the same?
No. An imperial gallon is 4.54609 L, about 20% larger. Choose “imperial gallons” in the converter for UK figures.
Related conversions
- Liters to US gallons (the reverse)
- Milliliters to US fluid ounces
- US cups to milliliters
- Volume converter: every volume unit, with the full drawing
The history: Why a US gallon is smaller than a British gallon.