Gallons to Liters Converter
Gallons measure fuel, paint, and water in the United States, while liters are the global standard everywhere else. Converting gallons to liters helps international drivers compare fuel prices, cooks scale American recipes, and travelers understand water bottle sizes. One US gallon equals 3.78541 liters — multiply gallons by 3.78541. This page uses US gallons throughout; the imperial gallon used in the UK is about 20% larger at 4.546 liters, so always check which gallon a source means. The converter above gives instant two-way results, the table lists common volumes, and the FAQs work through examples like the classic 5-gallon water jug.
Gallons to Liters Calculator
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Quick Reference Table
| Gallons (gal) | Liters (L) |
|---|---|
| 1 | 3.7854 |
| 2 | 7.5708 |
| 3 | 11.3562 |
| 4 | 15.1416 |
| 5 | 18.9271 |
| 6 | 22.7125 |
| 7 | 26.4979 |
| 8 | 30.2833 |
| 9 | 34.0687 |
| 10 | 37.8541 |
| 10 | 37.8541 |
| 20 | 75.7082 |
| 50 | 189.2706 |
| 100 | 378.5412 |
Frequently Asked Questions
How many liters are in 5 gallons?
5 gallons = 18.9271 liters. Just apply the conversion to any value with the converter above.
What is the formula to convert gallons to liters?
To convert gallons to liters, multiply the number of gallons by 3.78541. In short: 1 gal = 3.78541 L (US).
How many liters are in a 5-gallon water jug?
5 US gallons equals 18.9271 liters — the standard office water-cooler bottle. Multiply 5 × 3.785411784 = 18.92706 L. Enter 5 in the converter to verify.
How do I convert liters back to gallons?
Simply reverse the math: to go from liters to gallons, divide the liters by 3.785412. Or use our dedicated Liters to Gallons converter.