Gallons to Liters Converter
US Gallons → Liters
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UK Gallons → Liters
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1 US gallon = 3.78541 liters · 1 UK gallon = 4.54609 liters
How to convert gallons to liters
To convert US gallons to liters, multiply by 3.78541. For example, 5 US gallons × 3.78541 = 18.927 liters. To convert UK gallons to liters, multiply by 4.54609 instead.
Going the other way — to convert liters to US gallons — divide by 3.78541. So 10 liters ÷ 3.78541 = 2.642 US gallons.
The US gallon and UK (imperial) gallon are significantly different. A US gallon = 3.785 liters while a UK gallon = 4.546 liters — about 20% larger. This difference is important when comparing fuel economy between US and UK vehicles.
Gallons to liters conversion table
| Gallons (US) | Liters (US gal) | Liters (UK gal) |
|---|---|---|
| 1 gal | 3.785 L | 4.546 L |
| 2 gal | 7.571 L | 9.092 L |
| 3 gal | 11.356 L | 13.638 L |
| 4 gal | 15.142 L | 18.184 L |
| 5 gal | 18.927 L | 22.730 L |
| 10 gal | 37.854 L | 45.461 L |
| 15 gal | 56.781 L | 68.191 L |
| 20 gal | 75.708 L | 90.922 L |
| 50 gal | 189.271 L | 227.305 L |
| 100 gal | 378.541 L | 454.609 L |