Convert gallons to liters: formula and table
Convert US or British gallons to liters. Precise formula, complete table and practical examples.
Published on January 22, 2026Reading a fuel consumption in mpg (miles per gallon) or an American recipe in gallons often requires converting back to liters. The gallon value differs by country.
Understanding the conversion
1 US gallon (US gal) equals exactly 3.78541 liters. 1 imperial gallon (UK gal) equals 4.54609 liters. To convert US gallons to liters, multiply by 3.78541.
📐 Formula
Liters = US Gallons × 3.78541
Liters = UK Gallons × 4.54609
📊 Conversion table
| US Gallons | Liters | UK Gallons | Liters |
|---|---|---|---|
| 0.5 | 1.89 | 0.5 | 2.27 |
| 1 | 3.79 | 1 | 4.55 |
| 2 | 7.57 | 2 | 9.09 |
| 5 | 18.93 | 5 | 22.73 |
| 10 | 37.85 | 10 | 45.46 |
| 20 | 75.71 | 20 | 90.92 |
| 50 | 189.27 | 50 | 227.30 |
💡 Practical examples
Example 1: 10 US gallons (average tank)
10 × 3.78541 ≈ 37.85 liters. A 10 US gallon tank holds about 38 liters.
Example 2: 1 US gallon (American recipe)
1 × 3.78541 ≈ 3.785 liters. An American lemonade recipe of 1 gallon yields about 3.8 liters.
Example 3: 5 UK gallons (jerrycan)
5 × 4.54609 ≈ 22.73 liters. An English 5-gallon jerrycan holds about 22.7 liters.